| Abstract: | Three studies with 9 rhesus monkeys examined whether removal of the tissue of sulcus principalis affected Ss' memory for a list of spatial locations. Findings show that 3 Ss whose tissue in the sulcus principalis had been removed were no longer able to search effectively for food, relative to 3 unoperated controls, when given 25 spatial locations to remember. A less marked deficit was apparent in 3 Ss whose superior prefrontal convexity had been removed. Ss with sulcus principalis lesions learned as quickly as other Ss to choose between locations on the basis of a spatial cue, and they did not take significantly longer to shift from a previously rewarded location. Findings are considered in relation to the deficits observed in humans with unilateral frontal lesions and the possibility that frontal mechanisms operate on information in working memory. (55 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
