Functional dissociation of brain rhythms in social coordination

Muhammad Naeem; G Prasad; David Watson; JAS Kelso

doi:10.1016/j.clinph.2012.02.065

Functional dissociation of brain rhythms in social coordination

Muhammad Naeem, G Prasad, David Watson, JAS Kelso

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

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 (8-10Hz) and upper (10-12Hz) 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.SIGNIFICANCE: This research attests to the merit of analyzing sub-band activity in the alpha-mu domain in order to identify neural correlates of social coordination. Such 'neuromarkers' may be relevant for brain disorders such as apraxia and autism.

Original language	English
Pages (from-to)	1789-1797
Journal	Clinical Neurophysiology
Volume	123
Issue number	9
DOIs	https://doi.org/10.1016/j.clinph.2012.02.065
Publication status	Published (in print/issue) - 1 Sept 2012

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10.1016/j.clinph.2012.02.065

http://www.clinph-journal.com/article/S1388-2457(12)00135-6/abstract

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title = "Functional dissociation of brain rhythms in social coordination",

abstract = "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 (8-10Hz) and upper (10-12Hz) 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.SIGNIFICANCE: This research attests to the merit of analyzing sub-band activity in the alpha-mu domain in order to identify neural correlates of social coordination. Such 'neuromarkers' may be relevant for brain disorders such as apraxia and autism.",

author = "Muhammad Naeem and G Prasad and David Watson and JAS Kelso",

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doi = "10.1016/j.clinph.2012.02.065",

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T1 - Functional dissociation of brain rhythms in social coordination

AU - Naeem, Muhammad

AU - Prasad, G

AU - Watson, David

AU - Kelso, JAS

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N2 - 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 (8-10Hz) and upper (10-12Hz) 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.SIGNIFICANCE: This research attests to the merit of analyzing sub-band activity in the alpha-mu domain in order to identify neural correlates of social coordination. Such 'neuromarkers' may be relevant for brain disorders such as apraxia and autism.

AB - 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 (8-10Hz) and upper (10-12Hz) 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.SIGNIFICANCE: This research attests to the merit of analyzing sub-band activity in the alpha-mu domain in order to identify neural correlates of social coordination. Such 'neuromarkers' may be relevant for brain disorders such as apraxia and autism.

U2 - 10.1016/j.clinph.2012.02.065

DO - 10.1016/j.clinph.2012.02.065

M3 - Article

VL - 123

SP - 1789

EP - 1797

JO - Clinical Neurophysiology

JF - Clinical Neurophysiology

IS - 9

ER -

Functional dissociation of brain rhythms in social coordination

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