Olfactory discrimination after temporal lobe lesions in monkeys

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This study investigated the effects of bilateral superior and inferior temporal lobe lesions on the postoperative learning of olfactory and visual discrimination tests with both simultaneous and successive presentation of stimuli. The Ss were 3 rhesus monkeys with inferotemporal lesions, 3 with ablations of the anterior half of the superior temporal gyrus plus the temporal pole, and 2 unoperated controls. The inferotemporal group performed more poorly on the visual tests than the other 2 groups. On the simultaneous olfactory tests, no differences appeared; however, on the successive olfactory tests both operated groups were equally impaired when compared with the controls. Conclusions are: (a) the inferotemporal cortex is the essential area for visual discrimination in the temporal lobe and (b) while no final statement can be made regarding a focal area serving discrimination in olfaction, it is clear that it must be different from the one serving discrimination in vision. (16 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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