Influences of h and medium latency reflex responses of the soleus muscle while receiving with malleolus vibration during upright standing

Masahiro Sakita, Shinichiro Murakami, Takafumi Saito, Shuzo Kumagai

研究成果: ジャーナルへの寄稿記事

抄録

[Purpose] This study investigated whether afferent signals from ankle articular receptors affect the reflexive activity of the soleus muscle of participants while standing upright. [Methods] The subjects, 14 male healthy adults, stood in an upright position on an electric tilting table. Vibrations (about 90 Hz) were applied to the medial and lateral malleolus of the pivot leg (left leg of all subjects), and for the control condition the vibrators were turned off. The maximum M, H and medium latency reflex amplitudes and latencies were extracted from collected M, H and medium latency reflex (MLR) waves under both conditions. The mean amplitudes and latencies of maximum H and MLR were normalized using each subject's maximum M and height, respectively. [Results] The amplitudes and latencies of maximum H and MLR significantly decreased and were delayed under the malleolus vibration condition compared to the control condition. [Conclusion] We conclude that disynaptic inhibition of group I and II afferent fibers from the ankle joint provoke a decrease in the excitation of the α motoneurons of the soleus. It seems that a supraspinal center hardly regulates the excitability of the α motoneurons of the soleus or group II interneurons when the subject can predict how to maintain standing stability.

元の言語英語
ページ(範囲)1041-1045
ページ数5
ジャーナルJournal of Physical Therapy Science
24
発行部数10
DOI
出版物ステータス出版済み - 12 1 2012

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Vibration
Reaction Time
Reflex
Skeletal Muscle
Motor Neurons
Leg
Abnormal Reflexes
Ankle Joint
Interneurons
Ankle
Joints

All Science Journal Classification (ASJC) codes

  • Physical Therapy, Sports Therapy and Rehabilitation

これを引用

Influences of h and medium latency reflex responses of the soleus muscle while receiving with malleolus vibration during upright standing. / Sakita, Masahiro; Murakami, Shinichiro; Saito, Takafumi; Kumagai, Shuzo.

:: Journal of Physical Therapy Science, 巻 24, 番号 10, 01.12.2012, p. 1041-1045.

研究成果: ジャーナルへの寄稿記事

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