A Causal Role for the Cortical Frontal Eye Fields in Microsaccade Deployment.

Abstract:

:Microsaccades aid vision by helping to strategically sample visual scenes. Despite the importance of these small eye movements, no cortical area has ever been implicated in their generation. Here, we used unilateral and bilateral reversible inactivation of the frontal eye fields (FEF) to identify a cortical drive for microsaccades. Unexpectedly, FEF inactivation altered microsaccade metrics and kinematics. Such inactivation also impaired microsaccade deployment following peripheral cue onset, regardless of cue side or inactivation configuration. Our results demonstrate that the FEF provides critical top-down drive for microsaccade generation, particularly during the recovery of microsaccades after disruption by sensory transients. Our results constitute the first direct evidence, to our knowledge, for the contribution of any cortical area to microsaccade generation, and they provide a possible substrate for how cognitive processes can influence the strategic deployment of microsaccades.

journal_name

PLoS Biol

journal_title

PLoS biology

authors

Peel TR,Hafed ZM,Dash S,Lomber SG,Corneil BD

doi

10.1371/journal.pbio.1002531

subject

Has Abstract

pub_date

2016-08-10 00:00:00

pages

e1002531

issue

8

eissn

1544-9173

issn

1545-7885

pii

PBIOLOGY-D-16-00450

journal_volume

14

pub_type

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