人体筋紡錘に対する高頻度振動の効果(<特集>脳と神経の研究)

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Mechanical vibration on the skeletal muscle (M. triceps surae) of a normal man whose limb was fixed by a plaster cast to get isometric contraction, was followed by a change in the H-wave amplitude, recovery curve, and response time. The results are as follows: 1) When high frequency (about 300c.p.s.) vibration was given to the muscle, the amplitude of H-wave became larger, the recovery curve shifted to the left, and the response time became shorter. This result suggests that facilitation of the monosynaptic transmission occurs in the neuron-pool of the ventral horn by high frequency vibration to the muscle. This facilitation comes from augumentation of Group la afferent discharges that are derived from stretching the muscles by mechanical vibration. This phenomenon is the same as posttetanic potentiation in the human body evoked by tetanic electrical stimulation to the Group la fibers. 2) When low frequency (below 50c.p.s.) vibration was given to the muscle, the amplitude of H-wave became smaller, the recovery curve shifted to the right, and the response time increased in duration. This result suggests that depression of the monosynaptic transmission occurs in the spinal level by low freqency vibration on the muscle. The depression comes from augumentation of the afferent discharges (Group II and III) of sensory receptors in the skin. This was the first time that the author uncovered such phenomena in the human body. These phenomena are very useful in the treatment of paralyzed cases concerned with the department of rehabilitation.
千葉大学の論文
1964-09-28

人体筋紡錘に対する高頻度振動の効果(<特集>脳と神経の研究)

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