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|Titolo:||The role of frontal eye-fields and superior colliculi in visual search and non-visual search in rhesus monkeys|
|Autori interni:||MARZI, Carlo Alberto|
|Data di pubblicazione:||1982|
|Rivista:||BEHAVIOURAL BRAIN RESEARCH|
|Abstract:||Tested 20 rhesus monkeys on a visual search task in which they had to find and retrieve a peanut from a display of visually similar but inedible objects. The speed with which they did so was measured. Ss in which the superior colliculi or frontal eye fields had been removed took longer to find the peanut than 2 operated control groups. Ss with collicular lesions had longer latencies than those with frontal eye fields removed. These 2 groups were also tested on a 2nd task, nonvisual search, in which a peanut was concealed in each of 25 identical holes. Ss' task was to retrieve all peanuts as quickly as possible. The group with frontal eye fields removed made significantly more return errors than controls; but in contrast to the 1st task, Ss with collicular lesions were not impaired. Results are related to the physiological properties of frontal eye fields and superior colliculi and to the effects of frontal cortical brain damage in humans. It is suggested that the frontal eye fields are concerned with internally organized eye scanning, whereas the superior colliculi are concerned with the detection and location of targets that are then fixated involuntarily. (29 ref) (PsycLIT Database Copyright 1982 American Psychological Assn, all rights reserved)|
|Appare nelle tipologie:||01.01 Articolo in Rivista|
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