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Deficits in visual conditional learning after frontal-lobe lesions in man and monkey

Michael Petrides
MP

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Michael Petrides

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Patients with unilateral frontal- or temporal-lobe excisions were tested on a spatial and a nonspatial conditional associative task. These tasks required the learning of arbitrary associations between a set of stimuli and a set of responses. Patients with excisions from the left or right frontal cortex were severely impaired in learning both tasks. Patients with left or right temporal-lobe excisions that did not involve extensive damage to the hippocampal region were not impaired, whilst those with more radical involvement of the hippocampal region exhibited deficits that were material-specific and varied with the side of the lesion. In comparable work carried out with the monkey, it has been demonstrated that the posterior part of the dorsolateral frontal cortex (the periarcuate region) is the critical focus within the dorsolateral frontal cortex for conditional learning.

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Section :
Neurologie et physiologie
news icon Thème du colloque :
Neurologie et physiologie
host icon Hôte : Université de Montréal

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