EMG and MMG activities of agonist and antagonist muscles in Parkinson’s disease patients during absolute submaximal load holding

Abstract The purpose of the study was (1) to assess changes in electromyographical (EMG) and mechanomyographical (MMG) signals of the biceps and triceps brachii muscles during absolute submaximal load holding in Parkinson’s disease patients tested during their medication “ON-phase” and in age-matche...

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Bibliographic Details
Published in:Journal of electromyography and kinesiology 2009-10, Vol.19 (5), p.903-914
Main Authors: Marusiak, Jaroslaw, Jaskólska, Anna, Kisiel-Sajewicz, Katarzyna, Yue, Guang H, Jaskólski, Artur
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Biceps brachii
Coherence
Elbow flexion
Electromyography - methods
Female
Hand Strength
Humans
Muscle Contraction
Muscle, Skeletal - physiopathology
Myography - methods
Parkinson Disease - physiopathology
Physical Exertion
Physical Medicine and Rehabilitation
Postural Balance
Triceps brachii
Weight-Bearing
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Summary:Abstract The purpose of the study was (1) to assess changes in electromyographical (EMG) and mechanomyographical (MMG) signals of the biceps and triceps brachii muscles during absolute submaximal load holding in Parkinson’s disease patients tested during their medication “ON-phase” and in age-matched controls, and (2) to check whether mechanomyography can be useful in evaluation of neuromuscular system activity in Parkinson’s disease patients. The data analysis was performed on nine females with Parkinson’s disease and six healthy, age-matched females. The EMG and MMG signals were recorded from the short head of the biceps brachii (BB) and the lateral head of the triceps brachii (TB) muscles. It was concluded that compared to the controls, the Parkinson’s disease patients exhibited higher amplitude in the biceps brachii muscle and lower median frequency of the MMG signal in the both tested muscles. However, no differences in the EMG amplitude and an increase of the EMG median frequency in the triceps brachii muscle of the Parkinson’s disease group were observed. The MMG was not affected by physiological postural tremor and can depict differences between parkinsonians and controls, which may suggest that it is valuable tool for neuromuscular assessment for this condition.
ISSN:1050-6411
1873-5711
DOI:10.1016/j.jelekin.2008.03.003