An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task

Tommy Ng; Paul Sowman; Jon Brock; Blake Johnson

doi:10.5096/ASCS200940

An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task

Tommy Ng, Paul Sowman, Jon Brock, Blake Johnson

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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Abstract

Anticipatory postural adjustments (APA) are necessary for counteracting destabilizing forces induced by prime movements. The present study examined APA in a bimanual load-lifting task using simultaneous electroencephalography (EEG) and magnetoencephalography (MEG). A 1-kg weight placed on the left arm was either lifted by an experimenter (imposed condition) or by the subject (voluntary condition). In the imposed condition, inhibition of electromyographic (EMG) activity in the load-bearing muscle (biceps brachii, BB) only occurred after the onset of unloading and was accompanied by event-related desynchronisation (ERD) of cortical activity in the beta frequency band (15-30 Hz). This ERD was localized to the primary sensory cortex using beamforming analyses. In the voluntary condition, EMG inhibition and beta ERD occurred prior to the onset of lifting and beta ERD was localized to the primary motor cortex. This anticipatory cortical and muscle activity ties in well with the feedforward property of APA. This paradigm will be used to study problems of neuro-motor coordination in autism spectrum disorders (ASD).

Original language	English
Title of host publication	ASCS09
Subtitle of host publication	proceedings of the 9th conference of the Australasian Society for Cognitive Science
Editors	Wayne Christensen, Elizabeth Schier, John Sutton
Place of Publication	North Ryde, NSW
Publisher	Macquarie Centre for Cognitive Science
Pages	261-268
Number of pages	8
ISBN (Print)	9780646529189
DOIs	https://doi.org/10.5096/ASCS200940
Publication status	Published - 2010
Event	Conference of the Australasian Society for Cognitive Science (9th : 2009) - Sydney Duration: 30 Sept 2009 → 2 Oct 2009

Conference

Conference	Conference of the Australasian Society for Cognitive Science (9th : 2009)
City	Sydney
Period	30/09/09 → 2/10/09

Bibliographical note

Copyright 2009 by the Australasian Society for Cognitive Science. Publisher version archived with the permission of the Editor, ASCS09 : Proceedings of the 9th Conference of the Australasian Society for Cognitive Science. This copy is available for individual, non-commercial use. Permission to reprint/republish this version for other uses must be obtained from the publisher.

Keywords

event-related desynchronisation
anticipatory postural adjustment
bimanual coordination
autism spectrum disorder

Access to Document

10.5096/ASCS200940

Publisher version (open access)Final published version, 191 KBLicence: Unspecified

Cite this

Ng, T., Sowman, P., Brock, J., & Johnson, B. (2010). An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task. In W. Christensen, E. Schier, & J. Sutton (Eds.), ASCS09: proceedings of the 9th conference of the Australasian Society for Cognitive Science (pp. 261-268). Macquarie Centre for Cognitive Science. https://doi.org/10.5096/ASCS200940

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title = "An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task",

abstract = "Anticipatory postural adjustments (APA) are necessary for counteracting destabilizing forces induced by prime movements. The present study examined APA in a bimanual load-lifting task using simultaneous electroencephalography (EEG) and magnetoencephalography (MEG). A 1-kg weight placed on the left arm was either lifted by an experimenter (imposed condition) or by the subject (voluntary condition). In the imposed condition, inhibition of electromyographic (EMG) activity in the load-bearing muscle (biceps brachii, BB) only occurred after the onset of unloading and was accompanied by event-related desynchronisation (ERD) of cortical activity in the beta frequency band (15-30 Hz). This ERD was localized to the primary sensory cortex using beamforming analyses. In the voluntary condition, EMG inhibition and beta ERD occurred prior to the onset of lifting and beta ERD was localized to the primary motor cortex. This anticipatory cortical and muscle activity ties in well with the feedforward property of APA. This paradigm will be used to study problems of neuro-motor coordination in autism spectrum disorders (ASD).",

keywords = "event-related desynchronisation, anticipatory postural adjustment, bimanual coordination, autism spectrum disorder",

author = "Tommy Ng and Paul Sowman and Jon Brock and Blake Johnson",

note = "Copyright 2009 by the Australasian Society for Cognitive Science. Publisher version archived with the permission of the Editor, ASCS09 : Proceedings of the 9th Conference of the Australasian Society for Cognitive Science. This copy is available for individual, non-commercial use. Permission to reprint/republish this version for other uses must be obtained from the publisher.; Conference of the Australasian Society for Cognitive Science (9th : 2009) ; Conference date: 30-09-2009 Through 02-10-2009",

year = "2010",

doi = "10.5096/ASCS200940",

language = "English",

isbn = "9780646529189",

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Ng, T, Sowman, P, Brock, J & Johnson, B 2010, An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task. in W Christensen, E Schier & J Sutton (eds), ASCS09: proceedings of the 9th conference of the Australasian Society for Cognitive Science. Macquarie Centre for Cognitive Science, North Ryde, NSW, pp. 261-268, Conference of the Australasian Society for Cognitive Science (9th : 2009), Sydney, 30/09/09. https://doi.org/10.5096/ASCS200940

An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task. / Ng, Tommy; Sowman, Paul; Brock, Jon et al.
ASCS09: proceedings of the 9th conference of the Australasian Society for Cognitive Science. ed. / Wayne Christensen; Elizabeth Schier; John Sutton. North Ryde, NSW: Macquarie Centre for Cognitive Science, 2010. p. 261-268.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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AU - Johnson, Blake

N1 - Copyright 2009 by the Australasian Society for Cognitive Science. Publisher version archived with the permission of the Editor, ASCS09 : Proceedings of the 9th Conference of the Australasian Society for Cognitive Science. This copy is available for individual, non-commercial use. Permission to reprint/republish this version for other uses must be obtained from the publisher.

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AB - Anticipatory postural adjustments (APA) are necessary for counteracting destabilizing forces induced by prime movements. The present study examined APA in a bimanual load-lifting task using simultaneous electroencephalography (EEG) and magnetoencephalography (MEG). A 1-kg weight placed on the left arm was either lifted by an experimenter (imposed condition) or by the subject (voluntary condition). In the imposed condition, inhibition of electromyographic (EMG) activity in the load-bearing muscle (biceps brachii, BB) only occurred after the onset of unloading and was accompanied by event-related desynchronisation (ERD) of cortical activity in the beta frequency band (15-30 Hz). This ERD was localized to the primary sensory cortex using beamforming analyses. In the voluntary condition, EMG inhibition and beta ERD occurred prior to the onset of lifting and beta ERD was localized to the primary motor cortex. This anticipatory cortical and muscle activity ties in well with the feedforward property of APA. This paradigm will be used to study problems of neuro-motor coordination in autism spectrum disorders (ASD).

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A2 - Christensen, Wayne

A2 - Schier, Elizabeth

A2 - Sutton, John

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CY - North Ryde, NSW

T2 - Conference of the Australasian Society for Cognitive Science (9th : 2009)

Y2 - 30 September 2009 through 2 October 2009

ER -

An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task

Abstract

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Keywords

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Cite this