[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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The authors have developed a handy-typed impact hammer for biometric use and constructed an impact response measurement system. In this study, the loading period of an impact force is defined and examined the relation with the wave-height, which is the maximum value of an impact force. The relation between the contraction of muscle and the biomechanical properties measured from skin surface is also examined by using wave-heights, Ioading periods, and IEMGS. As a result, the sufficient correlation between these two is con-firmed.

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Management of muscle spasticity is very important for patients with central nervous disorder, both clinically and in ADL. The purpose of this study was to quantify the effects of the reflex inhibition posture of the upper limb on the muscle tone of the upper limb and the spasticity of the lower limb. Sixteen hemiplegic patients secondary to CVA participated in the experiment. The force and the opening of the finger joints and the joint angle of the elbow joint were measured with custom-made transducers while those joints were ex-tended manually by an experimenter. The stiffness of the joints was calculated both in a natural posture and in the reflex inhibition posture. At the same time, pendulum test of the lower leg was performed in both postures. The results clearly showed that the muscle tone of the upper limb and the spasticity of the lower limb decreased in the reflex inhibition posture in 4 to 5 subjects.

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In this short paper, a DVS (Delayed Video System) using a video camera and a personal computer is introduced. Using the personal computer's RAM as a frame buffer, DVS displays video images that were taken a few second before on the computer's display continuously. DVS could be useful for sports coaching or self training situations since it can provide visual feedback within a few seconds. DVS also provides a new func-tion, post triggered recording, which allows an event to be recorded after it has occurred.

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