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|Titolo:||Immediate postoperative retention of visual discriminations following selective cortical lesions in the cat|
|Autori interni:||BERLUCCHI, Giovanni|
|Data di pubblicazione:||1985|
|Rivista:||BEHAVIOURAL BRAIN RESEARCH|
|Abstract:||Cats were trained preoperatively for brightness discrimination and 7 pattern and form discriminations and then retested for preoperative retention. Cortical lesions were then placed in Areas 17 and 18 in Group 1 (4 cats); in Areas 17, 18, and 19 in Group 2 (3 cats); and in the suprasylvian cortex in Group 3 (4 cats). Results are also reported for Group 4 with extensive suprasylvian lesions and an unintended undercutting of Areas 17 and 18 (4 cats). Ss in Group 1 behaved as though they could immediately recognize the discriminative stimuli as efficiently as before. Group 2 Ss showed a substantial postoperative loss of all discriminations. In Group 3, postoperative retention was also generally impaired, but the reacquisition of efficient performance was superior to that of the previous group. Lesions suffered by Group 4 proved disruptive for all discriminative capacities, both in retention and in relearning. The excellent retention of all discriminations following Areas 17 and 18 lesions shows that these areas are not essential for complex vision in the cat. Results also indicate that the high-level visual capacities of destriate cats are not due to reorganization of readaptation processes occurring in extrastriate areas after a 17/18 removal. The retention deficits that were present in cats with cortical lesions more extensive than Areas 17 and 18 or outside of the latter areas prove the essential participation of extrastriate cortical areas in visual discrimination. (42 ref) (PsycLIT Database Copyright 1986 American Psychological Assn, all rights reserved)|
|Appare nelle tipologie:||01.01 Articolo in Rivista|
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