Beta rhythm events predict corticospinal motor output.

Abstract:

:The beta rhythm (15-30 Hz) is a prominent signal of sensorimotor cortical activity. This rhythm is not sustained but occurs non-rhythmically as brief events of a few (1-2) oscillatory cycles. Recent work on the relationship between these events and sensorimotor performance suggests that they are the biologically relevant elements of the beta rhythm. However, the influence of these events on corticospinal excitability, a mechanism through which the primary motor cortex controls motor output, is unknown. Here, we addressed this question by evaluating relationships between beta event characteristics and corticospinal excitability in healthy adults. Results show that the number, amplitude, and timing of beta events preceding transcranial magnetic stimulation (TMS) each significantly predicted motor-evoked potential (MEP) amplitudes. However, beta event characteristics did not explain additional MEP amplitude variance beyond that explained by mean beta power alone, suggesting that conventional beta power measures and beta event characteristics similarly captured natural variation in human corticospinal excitability. Despite this lack of additional explained variance, these results provide first evidence that endogenous beta oscillatory events shape human corticospinal excitability.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Hussain SJ,Cohen LG,Bönstrup M

doi

10.1038/s41598-019-54706-w

subject

Has Abstract

pub_date

2019-12-04 00:00:00

pages

18305

issue

1

issn

2045-2322

pii

10.1038/s41598-019-54706-w

journal_volume

9

pub_type

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