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

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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 languageEnglish
Pages (from-to)1-4
Number of pages4
JournalNeuroscience Letters
Volume179
Issue number1-2
DOIs
Publication statusPublished - 1994 Sep 26

Keywords

  • Aged
  • Decomposition
  • Macro-EMG
  • Motor unit
  • Recruitment threshold
  • Size principle

ASJC Scopus subject areas

  • Neuroscience(all)

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    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