Functional but not obligatory link between microsaccades and neural modulation by covert spatial attention.

ABSTRACT: Covert spatial attention is associated with spatial modulation of neural activity as well as with directional biases in fixational eye movements known as microsaccades. We studied how these two 'fingerprints' of attention are interrelated in humans. We investigated spatial modulation of 8-12 Hz EEG alpha activity and microsaccades when attention is directed internally within the spatial layout of visual working memory. Consistent with a common origin, spatial modulations of alpha activity and microsaccades co-vary: alpha lateralisation is stronger in trials with microsaccades toward versus away from the memorised location of the to-be-attended item and occurs earlier in trials with earlier microsaccades toward this item. Critically, however, trials without attention-driven microsaccades ne

SUBMITTER: Liu B 

PROVIDER: S-EPMC9205986 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature