Retention of Delayed-Alternation: Effect of Selective Lesions of Sulcus Principalis

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Science  19 Sep 1969:
Vol. 165, Issue 3899, pp. 1271-1273
DOI: 10.1126/science.165.3899.1271


Monkeys with bilateral lesions of the anterior, miiddle, or posterior thirds of the principal sulcus, of the periarcuate prefrontal region, or of the inferior parietal lobule were tested for retention of spatial delayed-alternation. Lesions limited to the middle third of sulcus principalis resulted in failure to relearn delayedalternation within 1000 trials; lesions elsewhere had little effect.

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