Results 171 to 180 of about 3,200 (215)

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 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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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.
Alkadhi H, Crelier GR, Boendermaker SH, Hepp-Reymond MC, Kollias SS   +4 more
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The human primary motor cortex

Neurology, 1996
Reply from the Authors : We appreciate the insightful comments of Drs. Foundas, Hong, Leonard, and Heilman regarding our recent paper. 1 Our response to each is as follows: We measured the distance between the center of mass of the activated region and the midline for both the finger and elbow movements.
S. M. Rao, J. R. Binder, T. A. Hammeke, P. A. Bandettini, J. A. Bobholz, J. A. Frost, B. M. Myklebust, R. D. Jacobson, J. S. Hyde   +8 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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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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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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TMS: A navigator for NIRS of the primary motor cortex?

Journal of Neuroscience Methods, 2011
Near-infrared spectroscopy (NIRS) is a non-invasive optical imaging technique, which is increasingly used to measure hemodynamic responses in the motor cortex. The location at which the NIRS optodes are placed on the skull is a major factor in measuring the hemodynamic responses optimally.
Koenraadt, K.L.M., Munneke, M., Munneke, M., Munneke, M., Duysens, J.E.J., Keijsers, N.L.W.   +5 more
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A Model of Reaching Dynamics in Primary Motor Cortex

Journal of Cognitive Neuroscience, 1998
Features of virtually all voluntary movements are represented in the primary motor cortex. The movements can be ongoing, imminent, delayed, or imagined. Our goal was to investigate the dynamics of movement representation in the motor cortex. To do this we trained a fully recurrent neural network to continually output the direction and magnitude of ...
S L, Moody, D, Zipser
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Primary motor cortex is involved in bimanual coordination

Nature, 1998
Many voluntary movements involve coordination between the limbs. However, there have been very few attempts to study the neuronal mechanisms that mediate this coordination. Here we have studied the activity of cortical neurons while monkeys performed tasks that required coordination between the two arms.
O, Donchin, A, Gribova, O, Steinberg, H, Bergman, E, Vaadia   +4 more
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