Topography of the human trapezius muscle: possibility for imaging of shoulder stiffness

DOI
  • Yoshinaga Saori
    Department of Fundamental Nursing, Faculty of Medicine, Miyazaki University
  • Kuramoto Eriko
    Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki
  • Kinoshita Hiroe
    Interdisciplinary Graduate School of Medicine and Veterinary Medicine, University of Miyazaki
  • Nemoto Seiji
    Department of Fundamental Nursing, Faculty of Medicine, Miyazaki University

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Other Title
  • 背部筋電位のトポグラフィ
  • ―肩こり視認化の可能性について―

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Abstract

Surface electromyogram (EMG) from trapezius regions of four healthy women were measured both immediately before and after exercise, and in recovery. Simultaneously, subjective symptoms in the area of the neck and shoulders were investigated. EMG data were analyzed by Fast Fourier Transform (FFT) and power spectrums were obtained. Based on these data, myogenic potential topography was composed in 6 bits resolution. Resultant myogenic potential topography recorded from human trapezius muscle was used to visually explain shoulder stiffness. Two women who complained of shoulder stiffness showed remarkable electrical change in the low frequency domain (1∼3 Hz, 10∼15 Hz) of EMG after exercise, while two subjects who had no complaints of shoulder stiffness did not. These results suggest that muscle activity represented by high potential in the low frequency domain is possibly a specific phenomenon for shoulder stiffness.

Journal

  • Structure and Function

    Structure and Function 10 (2), 115-119, 2012

    Co-medical Research Society of Structure and Function

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