Abstract:
:Movements overtly sample sensory information, making sensory analysis an active-sensing process. In this study, we show that visual information sampling is not just locked to the (overt) movement dynamics but to the internal (covert) dynamics of cortico-motor control. We asked human participants to perform continuous isometric contraction while detecting unrelated and unpredictable near-threshold visual stimuli. The motor output (force) shows zero-lag coherence with brain activity (recorded via electroencephalography) in the beta-band, as previously reported. In contrast, cortical rhythms in the alpha-band systematically forerun the motor output by 200 milliseconds. Importantly, visual detection is facilitated when cortico-motor alpha (not beta) synchronization is enhanced immediately before stimulus onset, namely, at the optimal phase relationship for sensorimotor communication. These findings demonstrate an ongoing coupling between visual sampling and motor control, suggesting the operation of an internal and alpha-cycling visuomotor loop.
journal_name
PLoS Bioljournal_title
PLoS biologyauthors
Tomassini A,Maris E,Hilt P,Fadiga L,D'Ausilio Adoi
10.1371/journal.pbio.3000898subject
Has Abstractpub_date
2020-10-20 00:00:00pages
e3000898issue
10eissn
1544-9173issn
1545-7885pii
PBIOLOGY-D-20-01860journal_volume
18pub_type
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