Persistent Link:
http://hdl.handle.net/10150/284228
Title:
Functional neuroanatomy of pleasant and unpleasant emotion
Author:
Lane Richard David
Issue Date:
1999
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
To investigate the basic neural circuitry underlying emotion, three brain imaging studies were performed using positron emission tomography and 15O-water. In each study subjects viewed pictures from the International Affective Picture System (IAPS). Study #1 examined the neural correlates of pleasant and unpleasant emotion in 12 healthy women. Compared to viewing neutral stimuli, viewing pleasant and unpleasant pictures were each associated with activation of thalamus, hypothalamus, midbrain and medial prefrontal cortex. Viewing pleasant pictures was also associated with activation of the head of the caudate nucleus and viewing unpleasant pictures was associated with activation of left medial temporal structures (amygdala, hippocampus and parahippocampal gyrus), bilateral extrastriate visual cortex, bilateral temporal poles and cerebellum. Study #2 examined the neural substrates of emotional valence, arousal and attention. Six healthy men were studied in twelve scan conditions generated from a 3 x 2 x 2 factorial design: 3 levels of valence (pleasant, unpleasant and neutral), 2 levels of arousal (high and low) and 2 levels of attention (easy and difficult distraction tasks). Subtraction of the low arousal pleasant and unpleasant conditions from the high arousal pleasant and unpleasant conditions revealed activation in the dorso-medial region of the thalamus and the medial prefrontal cortex. Activation of the medial prefrontal cortex was greater during the low distraction compared to the high distraction conditions. These results suggest that the thalamus and medial prefrontal cortex are activated as a function of the intensity of emotional arousal independent of valence. Study #3 examined the neural substrates of the experiential component of emotion using a selective attention paradigm. Ten healthy men viewed IAPS pictures as they attended either to their subjective emotional responses or the spatial location of the depicted scene. During attention to subjective emotional responses increased neural activity was elicited in rostral anterior cingulate cortex (BA32) and medial prefrontal cortex, right temporal pole, insula and ventral cingulate. Under the same stimulus conditions when subjects attended to spatial aspects of the pictures activation was observed in parieto-occipital cortex bilaterally. The findings indicate that the rostral anterior cingulate cortex participates in representing subjective emotional responses.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Biology, Neuroscience.; Psychology, Psychobiology.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Psychology
Degree Grantor:
University of Arizona
Advisor:
Schwartz, Gary E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleFunctional neuroanatomy of pleasant and unpleasant emotionen_US
dc.creatorLane Richard Daviden_US
dc.contributor.authorLane Richard Daviden_US
dc.date.issued1999en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractTo investigate the basic neural circuitry underlying emotion, three brain imaging studies were performed using positron emission tomography and 15O-water. In each study subjects viewed pictures from the International Affective Picture System (IAPS). Study #1 examined the neural correlates of pleasant and unpleasant emotion in 12 healthy women. Compared to viewing neutral stimuli, viewing pleasant and unpleasant pictures were each associated with activation of thalamus, hypothalamus, midbrain and medial prefrontal cortex. Viewing pleasant pictures was also associated with activation of the head of the caudate nucleus and viewing unpleasant pictures was associated with activation of left medial temporal structures (amygdala, hippocampus and parahippocampal gyrus), bilateral extrastriate visual cortex, bilateral temporal poles and cerebellum. Study #2 examined the neural substrates of emotional valence, arousal and attention. Six healthy men were studied in twelve scan conditions generated from a 3 x 2 x 2 factorial design: 3 levels of valence (pleasant, unpleasant and neutral), 2 levels of arousal (high and low) and 2 levels of attention (easy and difficult distraction tasks). Subtraction of the low arousal pleasant and unpleasant conditions from the high arousal pleasant and unpleasant conditions revealed activation in the dorso-medial region of the thalamus and the medial prefrontal cortex. Activation of the medial prefrontal cortex was greater during the low distraction compared to the high distraction conditions. These results suggest that the thalamus and medial prefrontal cortex are activated as a function of the intensity of emotional arousal independent of valence. Study #3 examined the neural substrates of the experiential component of emotion using a selective attention paradigm. Ten healthy men viewed IAPS pictures as they attended either to their subjective emotional responses or the spatial location of the depicted scene. During attention to subjective emotional responses increased neural activity was elicited in rostral anterior cingulate cortex (BA32) and medial prefrontal cortex, right temporal pole, insula and ventral cingulate. Under the same stimulus conditions when subjects attended to spatial aspects of the pictures activation was observed in parieto-occipital cortex bilaterally. The findings indicate that the rostral anterior cingulate cortex participates in representing subjective emotional responses.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectBiology, Neuroscience.en_US
dc.subjectPsychology, Psychobiology.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplinePsychologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorSchwartz, Gary E.en_US
dc.identifier.proquest9927500en_US
dc.identifier.bibrecord.b39568593en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.