Changes in motoneuron afterhyperpolarization duration in stroke survivors
نویسندگان
چکیده
منابع مشابه
Changes in motoneuron afterhyperpolarization duration in stroke survivors.
Hemispheric brain injury resulting from a stroke is often accompanied by muscle weakness in limbs contralateral to the lesion. In the present study, we investigated whether weakness in contralesional hand muscle in stroke survivors is partially attributable to alterations in motor unit activation, including alterations in firing rate modulation range. The afterhyperpolarization (AHP) potential ...
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This paper extends the observations presented in the previously published work on the afterhyperpolarization (AHP) duration changes in motoneurones (MNs) on the paretic (more affected) side of 11 post-stroke patients by the same analysis on the non-paretic (less-affected) side. The estimated AHP duration for patients' MNs supplying more-affected muscles was significantly longer than control val...
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1 afterhyperpolarization induced by tendon vibration 2 3 Christopher W. MacDonell, Tanya D. Ivanova, S. Jayne Garland 4 5 Graduate Program in Neuroscience, University of Western Ontario, London, Ontario, 6 Canada. 7 School of Physical Therapy, University of Western Ontario, London, Ontario, Canada. 8 Department of Physiology & Pharmacology, University of Western Ontario, London, 9 Ontario, Cana...
متن کاملChanges in the estimated time course of the motoneuron afterhyperpolarization induced by tendon vibration.
Group Ia afferents are activated vigorously with high-frequency tendon vibration and provide excitatory input to the agonist muscle and inhibitory input to the antagonist muscle group via inhibitory interneurons. The purpose of this experiment was to determine whether the afterhyperpolarization (AHP) time course in humans is altered in response to tendon vibration. The AHP time course is estima...
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Motor unit (MU) potentials were recorded from brachial biceps of healthy subjects aged 5.5-79 years. The subjects were subdivided into young (5.5-19 year) and adult (37.5-79 year) groups, between which single MU discharge characteristics were compared. Firing rates were in the ranges of 8.3-21.7 s(-1) (mean 12.87 s(-1)) and 5.9-18.7 s(-1) (mean 11.08 s(-1)) for young and adult groups, respectiv...
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ژورنال
عنوان ژورنال: Journal of Neurophysiology
سال: 2014
ISSN: 0022-3077,1522-1598
DOI: 10.1152/jn.01091.2012