Abstract:
:Previous findings are discordant regarding the effects of perinatal lesions of Cortical Areas 17 and 18 on visual discrimination learning in cats. Three potential determinants of such sparing were investigated: age at lesion (4 or 181 days), age at testing (3 or 9 months), and stimulus complexity. Age at testing was not significant, but performance varied with stimulus complexity and cortical damage, and there was an interaction between stimulus complexity and age at lesion. Both operated groups were transiently impaired in discriminating objects and subsequently learned to discriminate simple 2-dimensional patterns as well as done by controls, but the lesion groups were permanently impaired in discriminating similar patterns circumscribed by irrelevant lines. The age-at-lesion groups differed, however, in discriminating patterns masked by superimposed lines. The group lesioned at 181 days was severely impaired at both acquisition and subsequent intercurrent performance; the group lesioned at 4 days was impaired only at intercurrent performance. This study suggests that sparing after early postnatal damage of Areas 17 and 18 occurs only under limited circumstances.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Cornwell P,Herbein S,Corso C,Eskew R,Warren JM,Payne Bdoi
10.1037//0735-7044.103.6.1176subject
Has Abstractpub_date
1989-12-01 00:00:00pages
1176-90issue
6eissn
0735-7044issn
1939-0084journal_volume
103pub_type
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