Abstract:
:The superior colliculus (SC) is part of a network of brain areas that directs saccadic eye movements, overtly shifting both gaze and attention from position to position, in space. Here, we seek direct evidence that the SC also contributes to the control of covert spatial attention, a process that focuses attention on a region of space different from the point of gaze. While requiring monkeys to keep their gaze fixed, we tested whether microstimulation of a specific location in the SC spatial map would enhance visual performance at the corresponding region of space, a diagnostic measure of covert attention. We find that microstimulation improves performance in a spatially selective manner: thresholds decrease at the location in visual space represented by the stimulated SC site, but not at a control location in the opposite hemifield. Our data provide direct evidence that the SC contributes to the control of covert spatial attention.
journal_name
Proc Natl Acad Sci U S Aauthors
Müller JR,Philiastides MG,Newsome WTdoi
10.1073/pnas.0408311101keywords:
subject
Has Abstractpub_date
2005-01-18 00:00:00pages
524-9issue
3eissn
0027-8424issn
1091-6490pii
0408311101journal_volume
102pub_type
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