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[Abstract Title]. - Society for Neuroscience

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Reference list<br />

Arce F, Novick I, Shahar M, Ghez C, Vaadia E (2007) Adaptive strategies differ based on<br />

sensory estimates of initial and final reach positions. <strong>Abstract</strong>, <strong>Society</strong> <strong>for</strong> <strong>Neuroscience</strong>, 2007<br />

Disclosures: F.I. Arce , None; I. Novick, None; Y. Mandelblat-Cerf, None; E. Vaadia, None.<br />

Poster<br />

277. Voluntary Movement: Cortical Planning and Execution II<br />

Time: Sunday, November 16, 2008, 1:00 pm - 5:00 pm<br />

Program#/Poster#: 277.14/LL6<br />

<strong>Abstract</strong>: Withdrawn<br />

Poster<br />

277. Voluntary Movement: Cortical Planning and Execution II<br />

Time: Sunday, November 16, 2008, 1:00 pm - 5:00 pm<br />

Program#/Poster#: 277.15/LL7<br />

Topic: D.17.b. Cortical planning and execution<br />

<strong>Title</strong>: Corticospinal and EMG correlates of internal model <strong>for</strong>mation during <strong>for</strong>ce field motor<br />

adaptation<br />

Authors: *T. P. HUNTER 1 , P. SACCO 2 , D. TURNER 2 ;<br />

2 Hlth. and Biosci., 1 Univ. of East London, London, United Kingdom<br />

<strong>Abstract</strong>: There is an increase in muscle co-contraction during arm reaching in the early stages<br />

of motor adaptation to a novel <strong>for</strong>ce-field. This co-contraction gradually declines as subjects<br />

<strong>for</strong>m a new internal model to predicatively counteract the <strong>for</strong>ce-field. We used transcranial<br />

magnetic stimulation (TMS) to study whether changes in corticospinal excitability are associated<br />

with changes in voluntary EMG during motor adaptation. 10 right-handed subjects per<strong>for</strong>med<br />

visually instructed upper limb ballistic, planar, centre out reaching movements with a robotic<br />

manipulandum to different directions (135° / 270°) in 2 separate sessions (7 days apart). Each<br />

session included 11 reaching blocks of 48 trials (move ratio = 50%). Blocks 1-3 were

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