Abstract:
:After a session of unit activity recording, one of our monkeys presented an epileptic attack, which provoked contralateral tilting movements. The following days, the animal performed saccades and fixation tasks correctly in all directions, while contralateral arm reaching movements were severely impaired. To establish if the neurological lesion had changed the orienting performance we considered two types of stimuli, pleasant and aversive. Pleasant stimuli, presented in the ipsilateral or contralateral hemifield, readily drew the attention of the animal. If the same stimuli were presented simultaneously in both hemifields, the monkey oriented itself only toward the ipsilateral one. Aversive stimuli evoked an aggressive reaction only when the stimulus was localized in the ipsilateral hemifield. The animal clearly neglected the aversive stimulus presented in the contralateral hemifield. The animal recovered completely in 30 days. The postmortem examination revealed a lesion in the dorsomedial frontal cortex. The combined attentional and motor deficits suggest that this area may be involved in the preparation and execution of movements triggered by the affective meaning of the stimulus.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Lucchetti C,Lui F,Bon Ldoi
10.1016/s0028-3932(97)00100-0subject
Has Abstractpub_date
1998-03-01 00:00:00pages
251-7issue
3eissn
0028-3932issn
1873-3514pii
S0028-3932(97)00100-0journal_volume
36pub_type
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