ingest
cdrApp
2017-07-06T12:00:55.243Z
082b3de9-6030-4a3e-a983-035a47fc699e
modifyDatastreamByValue
RELS-EXT
fedoraAdmin
2017-07-06T12:23:38.518Z
Setting exclusive relation
modifyDatastreamByValue
RELS-EXT
fedoraAdmin
2017-07-06T12:23:39.127Z
Setting exclusive relation
addDatastream
MD_TECHNICAL
fedoraAdmin
2017-07-06T12:23:47.286Z
Adding technical metadata derived by FITS
modifyDatastreamByValue
RELS-EXT
fedoraAdmin
2017-07-06T12:24:03.319Z
Setting exclusive relation
addDatastream
MD_FULL_TEXT
fedoraAdmin
2017-07-06T12:24:04.466Z
Adding full text metadata extracted by Apache Tika
modifyDatastreamByValue
RELS-EXT
fedoraAdmin
2017-07-06T12:24:20.798Z
Setting exclusive relation
modifyDatastreamByValue
RELS-EXT
cdrApp
2017-07-06T12:27:39.963Z
Setting exclusive relation
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-01-25T08:09:39.110Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-01-27T08:34:12.431Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-02-28T19:58:04.511Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-03-14T05:11:32.206Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-05-17T16:42:31.817Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-07-11T03:34:44.013Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-07-17T23:52:57.362Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-08-15T20:01:11.472Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-09-21T20:19:21.963Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-09-26T23:34:40.041Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2018-10-12T00:13:10.282Z
modifyDatastreamByValue
MD_DESCRIPTIVE
cdrApp
2019-03-20T18:06:00.217Z
Sierra
Stringfield
Author
Neurobiology Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
Spring 2017
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
Sierra
Stringfield
Creator
Neurobiology Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE
ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the
resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings
of an environmental stimulus with a reward, such as the effects of a drug, can lead to the
formation of an association between the now conditioned stimulus and the expected outcome.
These stimuli are capable of acquiring incentive properties, in which they become
appetitive and wanted and are able to motivate behavior. In humans, exposure to these
stimuli can result in the expression of a conditioned response, such as experiencing the
subjective feeling of craving after exposure to drug-associated cues and attentional bias
toward those cues. Pavlovian conditioned approach can be used to model these
stimulus-outcome associations in animals. Animals will show conditioned approach
responses, and drugs such as nicotine can increase the expression of this behavior. This
dissertation will investigate the influence of nicotine on Pavlovian conditioned approach
and the neuronal circuitry that contributes to the expression of these behaviors.
Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex
that is responsible for representing stimulus-outcome associations and influencing
behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal
conditions and tested in situations that were designed to challenge the function of the
orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine
reduced this flexibility. We also investigated the contributions of sex differences to the
expression of this behavior, and the expression of BDNF protein after nicotine exposure or
conditioned approach training. We found that nicotine enhances Pavlovian conditioned
approach in both males and females, and the OFC is involved in expression of this
behavior. In addition, nicotine reduces the flexibility of conditioned responses after a
change in expected outcome, but did not influence BDNF protein expression. These studies
as a whole contribute to our understanding of the ability of nicotine to influence the
salience of conditioned cues, hopefully advancing treatment options that focus on reducing
the motivational hold that conditioned cues have on smokers who are attempting to remain
abstinent.
Spring 2017
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting
institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
Sierra
Stringfield
Creator
Neurobiology Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
Spring 2017
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
Spring 2017
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017-05
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde W.
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde W.
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Neurobiology
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde W.
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Sierra
Stringfield
Creator
Neuroscience Curriculum
School of Medicine
NICOTINE ENHANCEMENT OF CONDITIONED RESPONDING: INVOLVEMENT OF THE ORBITOFRONTAL CORTEX
Nicotine abuse is a substantial public health problem, and one cause of the resilience of nicotine addiction is the influence of conditioned cues. Repeated pairings of an environmental stimulus with a reward, such as the effects of a drug, can lead to the formation of an association between the now conditioned stimulus and the expected outcome. These stimuli are capable of acquiring incentive properties, in which they become appetitive and wanted and are able to motivate behavior. In humans, exposure to these stimuli can result in the expression of a conditioned response, such as experiencing the subjective feeling of craving after exposure to drug-associated cues and attentional bias toward those cues. Pavlovian conditioned approach can be used to model these stimulus-outcome associations in animals. Animals will show conditioned approach responses, and drugs such as nicotine can increase the expression of this behavior. This dissertation will investigate the influence of nicotine on Pavlovian conditioned approach and the neuronal circuitry that contributes to the expression of these behaviors. Specifically, we investigated the orbitofrontal cortex, a region of the prefrontal cortex that is responsible for representing stimulus-outcome associations and influencing behavioral flexibility. Pavlovian conditioned approach was assessed in rats under normal conditions and tested in situations that were designed to challenge the function of the orbitofrontal cortex, to measure the flexibility of conditioned approach, and how nicotine reduced this flexibility. We also investigated the contributions of sex differences to the expression of this behavior, and the expression of BDNF protein after nicotine exposure or conditioned approach training. We found that nicotine enhances Pavlovian conditioned approach in both males and females, and the OFC is involved in expression of this behavior. In addition, nicotine reduces the flexibility of conditioned responses after a change in expected outcome, but did not influence BDNF protein expression. These studies as a whole contribute to our understanding of the ability of nicotine to influence the salience of conditioned cues, hopefully advancing treatment options that focus on reducing the motivational hold that conditioned cues have on smokers who are attempting to remain abstinent.
2017
Neurosciences
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Donita
Robinson
Thesis advisor
Charlotte
Boettiger
Thesis advisor
Clyde W.
Hodge
Thesis advisor
Regina
Carelli
Thesis advisor
Fulton
Crews
Thesis advisor
text
2017-05
Stringfield_unc_0153D_16992.pdf
uuid:820f89b6-329c-4241-81b4-7a26d5772a4f
2017-04-23T13:12:10Z
2019-07-06T00:00:00
proquest
application/pdf
3561461
yes