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Featured researches published by Migiwa Hosokawa.


International Journal of Neuroscience | 1984

Physiological Variations of Warm and Cool Sense with Shift of Environmental

Temperature Iwao Hirosawa; Hidenori Dodo; Migiwa Hosokawa; Shinya Watanabe; Katsuo Nishiyama; Yasuma Fukuchi

In order to obtain control data on the temperature sense (warm and cool threshold values) of fingertips, the relationships between room temperature and either skin temperature, warm threshold or cool threshold of the middle fingertips were investigated in healthy subjects (6 males), using our thermo-esthesiometer. The skin temperature changes in a sigmoidal response with the variation of room temperature. A point of inflection for this response was observed at the room temperature of 15 degrees C, at which the greatest standard deviation of skin temperature occurred. The warm and cool thresholds, on the other hand, were also affected by variations of room temperature. Warm threshold and skin temperature or cool threshold and skin temperature bore a linear relation to each other, and the correlation coefficient was 0.854 in the former, and 0.925 in the latter, respectively. The disorder of temperature sensitivity (warm and cool thresholds) must always be considered together with the room temperature or skin temperature. On the other hand, the width of the neutral zone between warm and cool thresholds was affected by neither the changes of room temperature nor the changes of skin temperature. Hence, the width of the neutral zone was approximately constant, especially, at the room temperatures in the vicinity of 15 degrees C to 25 degrees C.


International Archives of Occupational and Environmental Health | 1988

Correlation between vibration-induced white finger and symptoms of upper and lower extremities in vibration syndrome

Hisataka Sakakibara; Yasuhiro Akamatsu; Masaru Miyao; Takaaki Kondo; Masashi Furuta; Shin'ya Yamada; Noriaki Harada; Shigenobu Miyake; Migiwa Hosokawa

SummaryThe correlation was investigated between the frequency of attacks of vibration-induced white finger (VWF) and numbness or coldness of the fingers and legs in patients with vibration syndrome. Some 1687 patients with vibration syndrome were examined and of these 342 chain-saw operators and 277 rock-drill operators had no disease other than vibration snydrome. Then subjects were matched by age and period of treatment within three years. In the last analysis, 20 in the VWF “almost everyday” group or in the “never” group, and 40 in the “occasionally” group were selected from the chain-saw operators, and from the rock-drill operators 32 in the VWF “everyday” or the “never” group and 64 in the “occasionally” group. The present study showed that, with the frequency of VWF attacks, patients had a higher prevalence of coldness not only in the fingers but also in the legs. These findings suggest a correlation between the severity of circulatory disturbances of the upper extremities and that of the lower ones in patients with vibration syndrome. Further studies on circulatory disturbances in the leg are required.


International Archives of Occupational and Environmental Health | 1983

Availability of temperature sense indices for diagnosis of vibration disease

Iwao Hirosawa; Shinya Watanabe; Yasuma Fukuchi; Katsuo Nishiyama; Migiwa Hosokawa

SummaryThe correlation between stages of vibration disease and hypesthesia of temperature sense detected with our thermo-esthesiometer was analyzed. We measured the warm and cool thresholds among operators (644 males) in three occupational categories with vibration exposure from hand-held vibratory tools, such as grinder, drill, sander, impact-wrench, bush-cutter and chain-saw. Through the examination of the relationship between the temperature threshold and the stage of vibration disease, the following was revealed: The warm sense threshold elevated parallel with the aggravation of vibration disease, although the skin temperature had no change or reduction. The hypesthesia of the cool sense threshold appeared in serious cases of vibration disease. This abnormality of the cool sense indicated a more intensive disorder than that detected by the warm sense abnormality. The width of the neutral zone between the warm and cool thresholds of the intact subjects was 6.6° C±3.8 C°. This neutral zone was enlarged with the aggravation of the vibration disease. Data also showed that the measurements of temperature sense threshold should be carried out under standardized room temperature.


Sangyo Igaku | 1977

THE ANNUAL CHANGES OF VIBRATION HAZARDS IN THE LUMBERJACKS OF STATE FORESTS

Iwao Hirosawa; Migiwa Hosokawa

Since 1958, with the labor rationalization policy of the state forests, chain-saws have been widely introduced in the felling operation of trees. Chain-saws have often caused damage to operators as have other vibrating tools such as drills, hammers and grinders. It was negotiated between labor and management in 1969 that one can not operate the chain-saw more than 2hr per day for the prevention of hazards, furthermore, that persons with vibration hazards, particularly white waxy hands, should not continue to use the chain-saw and to receive medical treatment with the recognition of the hazards as prescribed occupational hazards and with the displacement of their occupations.Medical examinations were carried out on the lumberjacks of the State Forests in Yamaguchi Prefecture for 6 years since 1970. In the present study, the effects of the time regulation of the use of chain-saw on the symptoms and the progress of the symptoms of serious cases after discontinuing the use of chain-saw were investigated. It was found that the regulation of operation time scarcely affected the symptoms, Peripheral blood circulation and peripheral nerve sensation were still impaired with the use of chain-saw. The complaints of the finger numbness, and of the systemic indisposition had increased each year.On the other hand, the progress of the symptoms after discontinuing the use of chain-saw resulted in a tendency of a decrease of the Raynauds phenomenon and recovery of the peripheral blood circulation and the peripheral nerve sensation, whereas the finger numbness still continued. Therefore it is necessary to find out a more satisfactory measure in the medical treatment of these hazards.Now every lumberjack has given up the use of chain-saw and has started to use an ax and a saw again. There are used freely by persons with vibration hazards as well as by the others. We are worried about the effects of ax impacts and vibrations and of strained posture leading to cervicobrachical syndrome and of low back pain. It seems to be necessary to consider preventive measures against these injuries.


Journal of human ergology | 1982

History of the studies on occupational cervicobrachial disorder in Japan and remaining problems.

Katsuyoshi Maeda; Shun'ichi Horiguchi; Migiwa Hosokawa


Journal of human ergology | 1982

HISTORY OF OCCUPATIONAL CERVICOBRACHIAL DISORDER IN JAPAN

Masaru Nakaseko; Rikio Tokunaga; Migiwa Hosokawa


Sangyo Igaku | 1973

CASH REGISTER OPERATORS' WORK AND ITS HYGIENICAL PROBLEMS IN A SUPER MARKET

Katsuo Nishiyama; Masaru Nakaseko; Migiwa Hosokawa


Japanese journal of industrial health | 1989

Analysis of subjective symptoms of coldness and numbness in the upper and lower limbs among patients with vibration syndrome

Hisataka Sakakibara; Masaru Miyao; Takaaki Kondo; Masashi Furuta; Shin'ya Yamada; Noriaki Harada; Shigenobu Miyake; Migiwa Hosokawa


Journal of human ergology | 1982

CLINICAL FEATURES OF OCCUPATIONAL CERVICOBRACHIAL DISORDER (OCD)

Shigenobu Miyake; Junya Himeno; Migiwa Hosokawa


Japanese journal of industrial health | 1981

[A case of progressive systemic sclerosis in construction workers-on the effect of exposed vibration at winch operating (author's transl)].

Noriaki Harada; Hirosawa I; Dodo H; Migiwa Hosokawa; Asagami C

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Katsuo Nishiyama

Shiga University of Medical Science

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Masaru Nakaseko

Kansai Medical University

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Shinya Watanabe

Shiga University of Medical Science

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