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dc.contributor.author Pentkowski, Nathan S en_US
dc.date.accessioned 2009-09-09T20:01:26Z en_US
dc.date.available 2009-09-09T20:01:26Z en_US
dc.date.issued 2004 en_US
dc.identifier.uri http://hdl.handle.net/10125/11875 en_US
dc.description Thesis (M.A.)--University of Hawaii at Manoa, 2004. en_US
dc.description Includes bibliographical references (leaves 52-58). en_US
dc.description viii, 58 leaves, bound ill. 29 cm en_US
dc.description.abstract This study investigated the role of the dorsal and ventral hippocampus in both unconditioned and conditioned defensive behaviors by examining the effects of pretraining ibotenic acid lesions to the dorsal or ventral hippocampus in Long Evans hooded male rats exposed to three types of threat stimuli, cat odor, a live cat and footshock. Conditioned defensive behaviors were assessed in the same context 24 hours after the threat exposure. During unconditioned test trials, DR lesions did not significantly alter behaviors during exposure to cat odor, a live cat, or footshock. Additionally, DR lesions failed to modify conditioned behaviors during all three tests of defense. In contrast, VR lesions significantly reduced both unconditioned and conditioned defensive behaviors during cat odor and footshock, while only reducing defensive behaviors during the unconditioned cat exposure trail. These results suggest a role for the VR in modulating anxiety-like behaviors in certain animal models of defense. en_US
dc.language.iso en-US en_US
dc.relation Theses for the degree of Master of Arts (University of Hawaii at Manoa). Psychology; no. 3191 en_US
dc.rights All 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. en_US
dc.subject Rats -- Defenses en_US
dc.subject Rats -- Nervous system en_US
dc.subject Fear in animals en_US
dc.title Effects of lesions to the dorsal and ventral hippocampus on defensive behaviors in rats en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US

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