Lesions suggest the lateral amygdala is partially involved in conditioned but not unconditioned defensive behavior in rats

dc.contributor.authorHubbard, David Thomas
dc.date.accessioned2009-09-09T20:00:48Z
dc.date.available2009-09-09T20:00:48Z
dc.date.issued2004
dc.descriptionThesis (M.A.)--University of Hawaii at Manoa, 2004.
dc.descriptionIncludes bibliographical references (leaves 46-52).
dc.description52 leaves, bound ill. 29 cm
dc.description.abstractThe current study exposed rats with lesions focused on the lateral amygdala to cat odor, a live cat, and shock and tested for subsequent conditioning to testing contexts. Significant differences between the LA and sham group were not found during exposure or during tests for conditioning 24-hours later. The results show that lesions of the LA altered the defensive behavior of rats in tests of short term conditioning immediately following shock and cat exposure. Following cat exposure the LA group engaged in less freezing and more crouch-sniff then controls. Following shock the LA group froze less and reared more than control rats. From the results, a number of debated roles for the lateral amygdala can be ruled out. It is concluded that the LA is important for conditioned defensive or residual emotional behavior, but not unconditioned defensive behavior.
dc.description.abstractThe current study exposed rats with lesions focused on the lateral amygdala to cat odor, a live cat, and shock and tested for subsequent conditioning to testing contexts. Significant differences between the LA and sham group were not found during exposure or during tests for conditioning 24-hours later. The results show that lesions of the LA altered the defensive behavior of rats in tests of short term conditioning immediately following shock and cat exposure. Following cat exposure the LA group engaged in less freezing and more crouch-sniff then controls. Following shock the LA group froze less and reared more than control rats. From the results, a number of debated roles for the lateral amygdala can be ruled out. It is concluded that the LA is important for conditioned defensive or residual emotional behavior, but not unconditioned defensive behavior.
dc.identifier.urihttp://hdl.handle.net/10125/11866
dc.language.isoen-US
dc.relationTheses for the degree of Master of Arts (University of Hawaii at Manoa). Psychology; no. 3142
dc.rightsAll UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dc.subjectRats -- Defenses
dc.subjectRats -- Nervous system
dc.subjectFear in animals
dc.titleLesions suggest the lateral amygdala is partially involved in conditioned but not unconditioned defensive behavior in rats
dc.typeThesis
dc.type.dcmiText

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