Motor cortical representation of position and velocity during reaching.

Motor cortical representation of position and velocity during reaching. Research Abstract Details 

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Motor cortical representation of position and velocity during reaching. Abstract Text:

Wei Wang,Sherwin S Chan,Dustin A Heldman,Daniel W Moran,

This study examines motor cortical representation of hand position and its relationship to the representation of hand velocity during reaching movements. In all, 978 motor cortical neurons were recorded from the proximal arm area of rostral motor cortex. The results demonstrate that position and velocity are simultaneously encoded by single motor cortical neurons in an additive fashion and that the relative weights of the position and velocity signals change dynamically during reaching. The two variables--hand position and hand velocity--are highly correlated in the standard center-out reaching task. A new reaching task (standard reaching) is introduced to minimize these correlations. Likewise, a new decoding method (indirect OLE) was developed to analyze the data by simultaneously decoding both three-dimensional (3D) hand position and 3D hand velocity from correlated neural activity. This method shows that, on average, the reconstructed velocity led the actual hand velocity by 122 ms, whereas the reconstructed position signal led the actual hand position by 81 ms.

Motor cortical representation of position and velocity during reaching. Publishing Authors By Initials

W Wang,SS Chan,DA Heldman,DW Moran,

For similar psychological phenomena and processes: mental processes: perception: space perception research abstracts see: psychological phenomena and processes: mental processes: perception: space perception research

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Motor cortical representation of position and velocity during reaching. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Journal of neurophysiology

VOLUME: 97

Page Numbers: 4258-70

Journal Abbreviation: J. Neurophysiol.

ISSN: 0022-3077

DAY: 28

MONTH: 03

YEAR: 2007

Motor cortical representation of position and velocity during reaching. Information

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LANGUAGE: eng

NlmUniqueID: 375404

Motor cortical representation of position and velocity during reaching. Keywords Mesh Terms:

KEYWORDS: Space Perception

MESH TERMS: physiology

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Grant and Affiliation Information for Motor cortical representation of position and velocity during reaching.

AFFILIATION: Department of Biomedical Engineering, Uncas A. Whitaker Hall, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA.

Country: United States

AGENCY: United States NCRR

GRANT: C06 RR-015502

ACRONYM: RR

MEDLINETA: J Neurophysiol

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