Results 51 to 60 of about 381,694 (246)

Motor cortex and gait in mild cognitive impairment: a magnetic resonance spectroscopy and volumetric imaging study [PDF]

, 2013
Gait disorders are common in the course of dementia, even at the stage of mild cognitive impairment, owing to probable changes in higher levels of motor control. Since motor control message is ultimately supported in the brain by the primary motor cortex
C. Annweiler, J.L. Wells, M. Montero-Odasso, M.J. Borrie, O. Beauchet, R. Bartha, V. Hachinski   +6 more
core   +3 more sources

Context-dependent limb movement encoding in neuronal populations of motor cortex

Nature Communications, 2019
Network activity in primary motor cortex (M1) controls dexterous limb movements. Here, the authors show that the M1 population code varies according to contextual motor demands that are conveyed via the secondary motor cortex (M2).
Wolfgang Omlor, Anna-Sophia Wahl, Pia Sipilä, Henry Lütcke, Balazs Laurenczy, I-Wen Chen, Lazar T. Sumanovski, Marcel van ’t Hoff, Philipp Bethge, Fabian F. Voigt, Martin E. Schwab, Fritjof Helmchen   +11 more
doaj   +1 more source

Temporal Evolution of Both Premotor and Motor Cortical Tuning Properties Reflect Changes in Limb Biomechanics [PDF]

, 2015
A prevailing theory in the cortical control of limb movement posits that premotor cortex initiates a high-level motor plan that is transformed by the primary motor cortex (MI) into a low-level motor command to be executed.
Hatsopoulos, Nicholas G., Lillicrap, Timothy P., Mardoum, Philip, Suminski, Aaron J.   +3 more
core   +2 more sources

Concurrent TMS to the primary motor cortex augments slow motor learning [PDF]

NeuroImage, 2014
Transcranial magnetic stimulation (TMS) has shown promise as a treatment tool, with one FDA approved use. While TMS alone is able to up- (or down-) regulate a targeted neural system, we argue that TMS applied as an adjuvant is more effective for repetitive physical, behavioral and cognitive therapies, that is, therapies which are designed to alter the ...
Shalini, Narayana, Wei, Zhang, William, Rogers, Casey, Strickland, Crystal, Franklin, Jack L, Lancaster, Peter T, Fox   +6 more
openaire   +2 more sources

Dual-hemispheric transcranial direct current stimulation (tDCS) over primary motor cortex does not affect movement selection.

PLoS ONE, 2019
Volition and sense of agency are two primary components of a voluntary or internally generated movement. It has been shown that movement selection cannot be altered without interfering with the sense of volition using single pulse transcranial magnetic ...
Nivethida Thirugnanasambandam, Felix G Contreras-Castro, Mark Hallett   +2 more
doaj   +1 more source

fNIRS Study of Brain Activation during Multiple Motor Control Conditions in Younger and Older Adults

Journal of Integrative Neuroscience
Background: Evidence suggests that aging contributes to decreased cerebral blood flow and brain oxyhemoglobin (HbO2) in the association cortices during rest.
Duoduo Yu, Conghui Wei, Zhen Yuan, Jun Luo   +3 more
doaj   +1 more source

Plasticity of the Primary Motor Cortex in Patients with Primary Brain Tumors

Neural Plasticity, 2020
There are two neuron-level mechanisms proposed to underlie neural plasticity: recruiting neurons nearby to support the lost function (ipsilesional plasticity) and uncovering latent pathways that can assume the function that was lost (contralesional ...
Nathan W. Kong, William R. Gibb, Suvarna Badhe, Benjamin P. Liu, Matthew C. Tate   +4 more
doaj   +1 more source

Conversion of Sensory Signals into Motor Commands in Primary Motor Cortex [PDF]

The Journal of Neuroscience, 1998
Movement triggered by sensory stimuli requires that the networks generating the motor commands receive an adequate driving input, which, in general, is a transformed version of the initial sensory signal. We investigated the nature of this transformation in a task in which monkeys categorize the speed of tactile stimuli as either low or high, reaching ...
E, Salinas, R, Romo
openaire   +2 more sources

Effects of Transcranial Direct Current Stimulation Over the Left Primary Motor Cortex on Verbal Intelligence

Frontiers in Human Neuroscience, 2022
Previous studies have shown that changes in gray matter density and volume in the left primary motor cortex are significantly associated with changes in individuals’ verbal intelligence quotient (VIQ), but not with their performance intelligence quotient
Yifan Huang, Yinling Zhang, Yizhe Zhang, Xiaoqin Mai   +3 more
doaj   +1 more source

Spatio-Temporal Patterning in Primary Motor Cortex at Movement Onset [PDF]

, 2017
Voluntary movement initiation involves the engagement of large populations of motor cortical neurons around movement onset. Despite knowledge of the temporal dynamics that lead to movement, the spatial structure of these dynamics across the cortical ...
Best, Matthew D., Brown, Kevin A., Hatsopoulos, Nicholas G., Suminski, Aaron J., Takahashi, Kazutaka   +4 more
core   +1 more source