Electromyographic Analysis of Functional Reach'

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  • ファンクショナル・リーチ動作の筋電図学的解析
  • ファンクショナル リーチ ドウサ ノ キンデンズガクテキ カイセキ

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Abstract

[Purpose] The aim of this study was to reveal changes in lumbar curvature and muscle activities during the functional reach test (FRT) with both arms. [Subjects] The subjects were 20 healthy male university students who were 20 years old. [Methods] The subjects' FR distance and muscle activities of the left multifidus (MF), gluteus maximus (GM), biceps femoris long head (BF), soleus (SL) and caput medial flexor hallucis brevis (FHB) during FRT by surface electromyography were measured. We divided the FR distance into 4 parts: arm elevation, initial (1/3FR cm), middle (2/3FR cm) and last (FR cm) part, and compared muscle activities in the 4 parts. [Results] Anterior lumbar curvature of all the subjects decreased during FRT, if the lumbar curvature at rest in the standing position before arm elevation was in the neutral position of anterior-posterior curvature. SL muscle activities between arm elevation and initial reach increased significantly, but the activities between initial and middle part of reach varied very little. FHB and MF muscle activities from the middle part of reach increased markedly. [Conclusion] In this study, changes in lumbar curvature and muscle activities during FR action were found. The results suggest that the FR distance of patients with lumbar pain becomes shortened because lumbar curvature decreased and MF muscle activities increased during FRT.<br>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 24 (6), 813-816, 2009

    The Society of Physical Therapy Science

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