Macaque SEF neurons encode object-centered directions of eye movements regardless of the visual attributes of instructional cues.

Abstract:

:Macaque SEF neurons encode object-centered directions of eye movements regardless of the visual attributes of instructional cues. Neurons in the supplementary eye field (SEF) of the macaque monkey exhibit object-centered direction selectivity in the context of a task in which a spot flashed on the right or left end of a sample bar instructs a monkey to make an eye movement to the right or left end of a target bar. To determine whether SEF neurons are selective for the location of the cue, as defined relative to the sample bar, or, alternatively, for the location of the target, as defined relative to the target bar, we carried out recording while monkeys performed a new task. In this task, the color of a cue-spot instructed the monkey to which end of the target bar an eye movement should be made (blue for the left end and yellow for the right end). Object-centered direction selectivity persisted under this condition, indicating that neurons are selective for the location of the target relative to the target bar. However, object-centered signals developed at a longer latency (by approximately 200 ms) when the instruction was conveyed by color than when it was conveyed by the location of a spot on a sample bar.

journal_name

J Neurophysiol

authors

Olson CR,Gettner SN

doi

10.1152/jn.1999.81.5.2340

subject

Has Abstract

pub_date

1999-05-01 00:00:00

pages

2340-6

issue

5

eissn

0022-3077

issn

1522-1598

journal_volume

81

pub_type

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