Results 261 to 270 of about 381,907 (300)

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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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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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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Constraints on Somatotopic Organization in the Primary Motor Cortex

Journal of Neurophysiology, 2001
Since the 1870s, the primary motor cortex (M1) has been known to have a somatotopic organization, with different regions of cortex participating in control of face, arm, and leg movements. Through the middle of the 20th century, it seemed possible that the principle of somatotopic organization extended to the detailed representation of different body ...
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Cortical Reorganization of Hand Motor Function to Primary Sensory Cortex in Hemiparetic Patients With a Primary Motor Cortex Infarct

Archives of Physical Medicine and Rehabilitation, 2005
To show cortical reorganization in hemiparetic patients with a primary motor cortex (M1) infarct including the precentral knob by using functional magnetic resonance imaging (fMRI).Case-control.Outpatient clinics in the rehabilitation department of a university hospital.Two stroke patients and 20 control subjects.By using fMRI, we evaluated the hand ...
Sung Ho, Jang, Sang Ho, Ahn, Dong Suk, Yang, Dong Kyu, Lee, Dong Kyu, Kim, Soo Min, Son   +5 more
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