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Abstract:
Abstract: The influence of the behavioral relevance of moving
stimuli was investigated by recording extracellular single-unit
activity from direction-selective neurons in the visual cortex of
awake behaving macaque monkeys trained to direct their attention to
one of several stimuli. Attention had a strong influence even in
early visual cortical areas. This influence was not restricted to
effects of spatial attention but also reflected the attended
feature. The modulation was best characterized by changes in
response gain, increasing the influence of the attended and
reducing the influence of the unattended stimuli without changing
the basic tuning properties of the cells. These results impose
important constraints on models of attention and will be presented
in the context of studies in other visual areas and using a variety
of techniques.
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