P-3-08-06
INDIVIDUAL DIFFERENCES OF THE SKIN BLOOD FLOW RATE CHANGE OF HUMAN FINGERTIP EVOKED BY THE EXTERNAL STIMULATION
Nikara, T., Harata, T., Noda, M., Seimiya, Y., Fjii, H. and Kato, T.(Hirosaki University, Hirosaki, Japan)
By studying the change of the skin blood flow rate of the fingertip to an external or an internal stimulus, the personal difference of the autonomic nerve action was investigated. A light stimulus was used as an external stimulus and also voluntary movement beginning was used as an internal stimulus. Subjects were requested whether they did step on the pedal or not by the difference of the blink pattern of the light. Results and Conclusions: The latencies of the change of the skin blood flow rate were fallen within 5 seconds and their lengths did not influenced on the difference of reaction time of the pedal stepping. Therefore, it was proven that the change of the skin blood flow rate of the fingertip was not evoked by the external or internal stimulus but by the first stimulus given to the subject. We could divide into four groups from the change pattern of the skin blood flow rate of the fingertip; the group which decreases to the stimulus, a fluctuating group, an increasing group and the group which doesn't show any change. The decreasing group was in many occurring frequencies. The diversities of the change pattern of the skin blood flow rates in the subjects suggest that the autonomic nerve action of the individual to mental stress is not similar.
P-3-08-07
Autonomic Nervous Examination with Microvibration in Neuromuscular Diseases
Iwao Saito-1), Kazumasa Sudo-2), Koji Shima-3), Kunio Tashiro-2)
1) Medical service Center, Muroran Institute of Technology, 2) Department of Neurological Science, Hokkaido University School of Medicine. 3) National Minami Sapporo Hospital.
Even skeletal muscles, the muscle is under influence of the autonomic nervous system. We examined autonomic nervous function from aspect of microvibration (MV) in organic neuromuscular diseases.
Subjects: Thirty-two subjects are divided into two groups. A group is 24 patients who are diagnosed multiple sclerosis (6), spastic paralysis (6), syringomyelia (6) and parkinson disease (6). B group is 8 normal volunteers.
Method: MV apparatus was elaborated in cooperation with Research Institute of Applied Electricity (Hokkaido Univ.). MV of 8-20 cpm was divided to them, α-l, 2, 3, 4 and βwave bands. The subjects were examined in lying position in the thenar muscle and muscle quadriceps.
Results: 1) Thenar muscles: In A group, theta and/or βwave bands showed dominant suggesting an abnormal sign of autonomic nervous function. On the other hand, αwave bands were most dominant in B group. 2) In both groups, βwave became dominant in muscle contraction. 3) In cases with tremor, the subjects showed concomitant theta and βwave dominancy.
Summary: Abnormality of autonomic nervous function was observed more frequently in patiens with neuromuscular diseases than normal subjects. It is suggested that Microvibration examination test might be available to evaluate the entity and severity of neuromuscular diseases, and to self-control training of tremor for rehabilitation.
