Results 201 to 210 of about 381,694 (246)

Primary motor cortex isolation: complete paralysis with preserved primary motor cortex

Journal of the Neurological Sciences, 1998
We present a left-sided hemiplegic patient with a cerebrovascular lesion involving the medial part of the right frontal and parietal lobes and the corpus callosum, but sparing the hand area of right primary motor cortex (M1). Several studies using transcranial magnetic stimulation demonstrated functional integrity of the efferent pathways from the ...
K, Sakai, E, Kojima, M, Suzuki, Y, Ugawa, Y, Terao, R, Hanajima, I, Kanazawa   +6 more
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The human primary motor cortex

Neurology, 1996
To the Editor: Rao et al.1 used functional magnetic resonance imaging (fMRI) to map the somatotopic organization of the human primary motor cortex. Eight neurologically intact right-handed subjects performed voluntary movements of the hand, arm, and foot while undergoing echo-planar imaging.
Anne L. Foundas, Kim Hong, Christiana M. Leonard, Kenneth M. Heilman   +3 more
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Plasticity and Primary Motor Cortex

Annual Review of Neuroscience, 2000
One fundamental function of primary motor cortex (MI) is to control voluntary movements. Recent evidence suggests that this role emerges from distributed networks rather than discrete representations and that in adult mammals these networks are capable of modification.
J N, Sanes, J P, Donoghue
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Primary motor cortex disinhibition during motor skill learning

Journal of Neurophysiology, 2014
Motor learning requires practice over a period of time and depends on brain plasticity, yet even for relatively simple movements, there are multiple practice strategies that can be used for skill acquisition. We investigated the role of intracortical inhibition in the primary motor cortex (M1) during motor skill learning.
James P, Coxon, Nicola M, Peat, Winston D, Byblow   +2 more
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Primary motor cortex hyperexcitability in Fabry’s disease

Clinical Neurophysiology, 2013
Involvement of pyramidal cells and/or changes in excitability of brain areas remote from an ischemic stroke has been demonstrated. Since in Fabry disease (FD), specific cerebrovascular lesions are present, we thought to investigate motor cortex excitability, using transcranial magnetic stimulation.Resting (RMT) and active (AMT) motor threshold, input ...
Ortu E, Fancellu L, Sau G, Falchi P, Traccis S, PES, Giovanni Mario, GANAU, Antonello, SECHI, Gianpietro   +7 more
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Ipsilateral involvement of primary motor cortex during motor imagery

European Journal of Neuroscience, 2000
AbstractTo investigate whether motor imagery involves ipsilateral cortical regions, we studied haemodynamic changes in portions of the motor cortex of 14 right‐handed volunteers during actual motor performance (MP) and kinesthetic motor imagery (MI) of simple sequences of unilateral left or right finger movements, using functional magnetic resonance ...
PORRO, Carlo Adolfo, Cettolo, V., Francescato, M. P., BARALDI, Patrizia   +3 more
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Early consolidation in human primary motor cortex

Nature, 2002
Behavioural studies indicate that a newly acquired motor skill is rapidly consolidated from an initially unstable state to a more stable state, whereas neuroimaging studies demonstrate that the brain engages new regions for performance of the task as a result of this consolidation.
Wolf, Muellbacher, Ulf, Ziemann, Joerg, Wissel, Nguyet, Dang, Markus, Kofler, Stefano, Facchini, Babak, Boroojerdi, Werner, Poewe, Mark, Hallett   +8 more
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Somatotopy in the ipsilateral primary motor cortex

NeuroReport, 2002
Conflicting reports exist about the occurrence, reliability and localization of activation in the ipsilateral primary motor cortex (M1). We re-examined this issue with functional magnetic resonance imaging in 12 volunteers performing right hand, finger, wrist, elbow, foot and tongue movements in two separate sessions.
Hatem, Alkadhi, Gerard R, Crelier, Sabina Hotz, Boendermaker, Marie-Claude, Hepp-Reymond, Spyros S, Kollias   +4 more
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Postnatal Development of the Motor Representation in Primary Motor Cortex

Journal of Neurophysiology, 2000
The purpose of this study was to examine when the muscles and joints of the forelimb become represented in primary motor cortex (M1) during postnatal life and how local representation patterns change. We examined these questions in cats that were anesthetized (45–90 days, n = 14; adults, n = 3) and awake ( n = 4; 52–86 days).
S, Chakrabarty, J H, Martin
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