Examination of motor unit control properties in stroke survivors using surface EMG decomposition: a preliminary report. Annu Int Conf IEEE Eng Med Biol Soc 2011;2011:8243-6
Date
01/19/2012Pubmed ID
22256256DOI
10.1109/IEMBS.2011.6092032Scopus ID
2-s2.0-84861660835 (requires institutional sign-in at Scopus site) 29 CitationsAbstract
The objective of this pilot study was to examine alterations in motor unit (MU) control properties, (i.e. MU recruitment and firing rate) after stroke utilizing a recently developed high-yield surface electromyogram (EMG) decomposition technique. Two stroke subjects participated in this study. A sensor array was used to record surface EMG signals from the first dorsal interosseous (FDI) muscle during voluntary isometric contraction at varying force levels. The recording was performed in both paretic and contralateral muscles using a matched force protocol. Single motor unit activity was extracted using the surface EMG decomposition software from Delsys Inc. The results from the two stroke subjects indicate a reduction in the mean motor unit firing rate and a compression of motor unit recruitment range in paretic muscle as compared with the contralateral muscles. These findings provide further evidence of spinal motoneuron involvement after a hemispheric brain lesion, and help us to understand the complex origins of stroke induced muscle weakness.
Author List
Suresh N, Li X, Zhou P, Rymer WZAuthor
Xiaoyan Li PhD Assistant Professor in the Neurology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Action PotentialsAdult
Biomechanical Phenomena
Demography
Electromyography
Female
Humans
Isometric Contraction
Male
Middle Aged
Motor Neurons
Recruitment, Neurophysiological
Signal Processing, Computer-Assisted
Stroke
Surface Properties
Survivors