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pro vyhledávání: '"Eric A Kirk"'
Autor:
Eric A Kirk, Britton A Sauerbrei
Publikováno v:
eLife, Vol 13 (2024)
A new device improves the way scientists can record the activity of motor units in a wide range of animals and settings.
Externí odkaz:
https://doaj.org/article/e86ad0e0b0d54a0492a4dbdad820e538
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-20 (2024)
Abstract Coordinated movement requires the nervous system to continuously compensate for changes in mechanical load across different conditions. For voluntary movements like reaching, the motor cortex is a critical hub that generates commands to move
Externí odkaz:
https://doaj.org/article/c3a532d161bd49098b62cd2589d882ff
Publikováno v:
Journal of Applied Physiology. 132:402-412
During activity-dependent potentiation (ADP), motor unit firing rates (MUFRs) are lower; however, the mechanism for this response is not known. During increasing torque isometric contractions at low contraction intensities, MUFR trajectories initiall
Autor:
Charles L. Rice, Eric A. Kirk
Publikováno v:
Experimental Brain Research. 239:2755-2766
This study explored the relationship between single motor unit (MU) firing rates (FRs) and limb movement velocity during voluntary shortening contractions when accounting for the effects of time course variability between different kinematic comparis
Publikováno v:
Physiological genomics. 54(8)
Skeletal muscle is adaptable to a direct stimulus of exercise-induced muscle damage (EIMD). Local muscle gene networks and systemic circulatory factors respond to EIMD within days, mediating anti-inflammation and cellular proliferation. Here we show
Autor:
Naveed Ejaz, Eric A. Kirk, Spencer A. Arbuckle, Jeffrey Weiler, Charles L. Rice, Jörn Diedrichsen, J. Andrew Pruszynski, Marc H. Schieber
Publikováno v:
Brain and Mind Institute Researchers' Publications
J Neurosci
J Neurosci
How is the primary motor cortex (M1) organized to control fine finger movements? We investigated the population activity in M1 for single finger flexion and extension, using 7T functional magnetic resonance imaging (fMRI) in female and male human par
Publikováno v:
Journal of neurophysiology. 126(4)
Changes of neural drive to the muscle with adult aging, measured as motor unit firing rates during limb movements, are unknown. Throughout maximal voluntary efforts we found that, in comparison with young adults, firing rates were lower during isomet
Publikováno v:
Experimental brain research. 239(12)
During voluntary contractions, limb muscle motor unit (MU) firing rates accelerate over a small force range and saturate in response to increasing contraction intensity. In comparison, facial muscles are cranially innervated, and some function withou
Publikováno v:
Journal of applied physiology (Bethesda, Md. : 1985). 130(6)
Motor unit (MU) firing rates (FRs) are lower in aged adults, compared with young, at relative voluntary contraction intensities. However, from a variety of independent studies of disparate muscles, the age-related degree of difference in FR among mus
Publikováno v:
J Neurophysiol
Current understanding of human motor unit (MU) control and aging is mostly derived from hand and limb muscles that have spinal motor neuron innervations. The aim here was to characterize and test whether a muscle with a shared innervation supply from