Macro-EMG and motor unit recruitment threshold: differences between the young and the aged

Yoshihisa Masakado; Yukio Noda; Masa aki Nagata; Akio Kimura; Naoichi Chino; Kazuto Akaboshi

doi:10.1016/0304-3940(94)90920-2

Macro-EMG and motor unit recruitment threshold: differences between the young and the aged

Yoshihisa Masakado, Yukio Noda, Masa aki Nagata, Akio Kimura, Naoichi Chino, Kazuto Akaboshi

Research output: Contribution to journal › Article

37 Citations (Scopus)

Abstract

The relationship between macro-EMG (electromyography) and motor unit recruitment threshold was studied in the first dorsal interosseous (FDI) muscle of normal young and aged subjects. During voluntary isometric contraction, motor unit action potentials (MUAP) were collected by a special quadrifilar electrode and decomposed to each MUAP train (MUAPT) using an EMG signal decomposition technique. Macro-EMG was obtained from the electrode shaft, then triggered and averaged for each MUAPT. A positive linear correlation was observed in both the young and aged subjects. However, the correlation coefficients were significantly lower in the aged individuals than in the young individuals.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Neuroscience Letters
Volume	179
Issue number	1-2
DOIs	https://doi.org/10.1016/0304-3940(94)90920-2
Publication status	Published - 1994 Sep 26

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Keywords

Aged
Decomposition
Macro-EMG
Motor unit
Recruitment threshold
Size principle

ASJC Scopus subject areas

Neuroscience(all)

Cite this

Masakado, Y., Noda, Y., Nagata, M. A., Kimura, A., Chino, N., & Akaboshi, K. (1994). Macro-EMG and motor unit recruitment threshold: differences between the young and the aged. Neuroscience Letters, 179(1-2), 1-4. https://doi.org/10.1016/0304-3940(94)90920-2

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10.1016/0304-3940(94)90920-2