Abstract:
:The two experiments of the present study examined the influence of bilateral electrophysiologically-guided ibotenic acid lesions of the medial (gustatory) and lateral (viscerosensory) subdivisions of the parabrachial nucleus (PBN) on lipoprivic feeding and on the acquisition of a conditioned taste aversion. In Experiment 1, mercaptoacetate (0, 400, 600, or 800 micromol/kg) failed to enhance food intake in normal rats maintained and tested on standard laboratory chow. In the same procedure, rats with lesions of the medial or lateral PBN consumed less food during baseline but nonetheless were sensitive to the orexigenic action of mercaptoacetate. In Experiment 2, both types of PBN lesions prevented acquisition of a conditioned taste aversion induced by the oral self administration of lithium chloride. The results suggest that PBN neurons essential for conditioned taste aversion are not involved in the mercaptoacetate-induced feeding of rats maintained and tested on standard laboratory chow.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Trifunovic R,Reilly Sdoi
10.1016/s0361-9230(02)00766-9keywords:
subject
Has Abstractpub_date
2002-05-01 00:00:00pages
107-13issue
1eissn
0361-9230issn
1873-2747pii
S0361923002007669journal_volume
58pub_type
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