Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BCCN AG-Seminar

Wednesday, 23.06.2010 17:15 c.t.

Directional and temporal selectivity in motor cortex

by Prof. Dr. Jorge José
from University at Buffalo, NY, USA

Contact person: Theo Geisel

Location

Seminarraum Haus 2, 4. Stock (Bunsenstr.)

Abstract

It is generally believed that the planning of voluntary reaches primarily engages the Pre-Motor and Parietal cortices while their execution is controlled by the Primary Motor cortex. Primary Motor cortex has been involved in different force learning patterns during reaching motions. Mastering the arm dynamics to control such hand motions requires the distinction and the coordination of different acceleration patterns internally produced with different time scales. Given that intentional planning is thought to occur in Pre-motor and Parietal areas, here we ask if movement activity does contribute to the update of movement planning within motor cortex. We found indeed that movement activity increases the information transmission of preparatory activity in motor cortex and yields a mutual-information oscillatory pattern which allows a precise angular selection rule and the timings of maximal acceleration relative to maximal speed. Movement activity in motor cortex specifically contributes to the update of movement preparation for selection of multiple temporal dynamic time-scales.

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