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Functional dissociation of brain rhythms in social coordination

journal contribution
posted on 2023-06-09, 02:28 authored by Muhammad Naeem, Girijesh Prasad, David R Watson, J A Scott Kelso
Objectives: The goal of this research was to investigate sub-band modulations in the mu domain in dyads performing different social coordination tasks. Methods: Dyads of subjects performed rhythmic finger movement under three different task conditions: intrinsic – maintain self-produced movement while ignoring their partner’s movement; in-phase – synchronize with partner; and anti-phase – maintain syncopation with partner. Movement profiles of the dyads were used to estimate a synchronization index (SI) to verify differences in coordination according to each task. EEG was recorded during task performance and at baseline (partner’s actions hidden from view). Log power ratios of mu band activity (active against baseline) were used to assess the relative levels of synchronization/de-synchronization in both the upper and lower mu bands. Results: Results confirm a functional dissociation of lower (8–10 Hz) and upper (10–12 Hz) mu bands in social coordination tasks. Lower mu band activity was independent of specific modulations across tasks and hemispheric preferences. Upper mu band activity was sensitive to coordination tasks and exhibited marked differences between the hemispheres. Accentuated de-synchronization of right relative to left hemisphere in the anti-phase task appeared related to the greater demand of perceptual-motor discrimination. Left hemisphere de-synchronization in both in-phase and anti-phase coordination was interpreted in terms of successful production of imitation. Right hemisphere synchronization in the intrinsic task was interpreted as inhibition of an imitative response tendency. Conclusions: Functional dissociation of lower and upper mu band and hemispheric preferences exists in real-time social coordination.

History

Publication status

  • Published

File Version

  • Published version

Journal

Clinical Neurophysiology

ISSN

1388-2457

Publisher

Elsevier

Issue

9

Volume

123

Page range

1789-1797

Department affiliated with

  • BSMS Neuroscience Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2016-08-10

First Compliant Deposit (FCD) Date

2016-08-10

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