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Vibration hazards in forestry workers of the chain saw operators of a determined area in Japan
HUMAN
RESPONSE
TO VIBRATION
615
difference. In the evaluation of vibration, the impulse characteristics of vibration, the transmission of vibration to the hand (i.e., grip forces and position of the hand) and the use of hearing protectors should be included in the hygienic rating of vibration. Topics: Vibration Syndrome ( Vibration-induced White Finger); Hand-held Tools (Chain Saw, Percussive, Rotary) ; Body Posture (Hand Grip) ; Perceptual Mechanisms (Hearing) ; Complex Vibration (Impulses). M. Futatsuka, M. Takamatsu, T. Sakurai, K. Meada, H. Esaki, 1. Hirosawa and K. Wakaba 1980 The Journal of Science of Labour 56, 27-48. Vibration hazards in forestry workers of the chain saw operators of a determinated area in Japan. (22 pages, 5 figures, 13 tables, 25 references) Authors’ Abstract. A different approach should be applied to the method of investigation and that the survey should include the whole population of a determinated area of forestry industry subjected to the effects of chain saws. Authors achieved investigation concerned to the different patterns of affections caused by the effects of the vibration, between either state or private forestry workers. In this research we observed a typical pattern of the vibration hazards, from the viewpoint of evolution of the lesion and characterized by manifestations of numbness of the fingers and peripheral circulatory disturbances at the initial stage which then passed on to another evolutionary stage by concomitant additional disturbances, first anomalities of the autonomous nervous system and next to dullness of‘ peripheral perception and next to decreasing muscle power. Also we observed the fact that the difference of incidence of the vibration hazards among a population subjected to the same geographical area (meaning under the same conditions of nature and host agents) seems to be due to the difference of the labour conditions enforced and to which it is exposed. Topics: Vibration Syndrome (Vibration-induced White Finger, Bone and Joint; Disrributed Ffects) ; Hand-held Tools ( Chain Saw) ; Vibration Sense ( Threshold ). Note. Copies of all papers included in this section to Vibration Literature Collection at the Institute University of Southampton. The papers may be and, for a small charge, photocopies of them can
will be found in the Human Response of Sound and Vibration Research, The used by persons visiting the Institute usually be provided by post.
Contributions to the Literature Collection are requested from relevant research groups. They should be sent to Dr M. J. Grtjin, Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton, Southampton SO9 5NH, England.
RESPONSE
TO VIBRATION
615
difference. In the evaluation of vibration, the impulse characteristics of vibration, the transmission of vibration to the hand (i.e., grip forces and position of the hand) and the use of hearing protectors should be included in the hygienic rating of vibration. Topics: Vibration Syndrome ( Vibration-induced White Finger); Hand-held Tools (Chain Saw, Percussive, Rotary) ; Body Posture (Hand Grip) ; Perceptual Mechanisms (Hearing) ; Complex Vibration (Impulses). M. Futatsuka, M. Takamatsu, T. Sakurai, K. Meada, H. Esaki, 1. Hirosawa and K. Wakaba 1980 The Journal of Science of Labour 56, 27-48. Vibration hazards in forestry workers of the chain saw operators of a determinated area in Japan. (22 pages, 5 figures, 13 tables, 25 references) Authors’ Abstract. A different approach should be applied to the method of investigation and that the survey should include the whole population of a determinated area of forestry industry subjected to the effects of chain saws. Authors achieved investigation concerned to the different patterns of affections caused by the effects of the vibration, between either state or private forestry workers. In this research we observed a typical pattern of the vibration hazards, from the viewpoint of evolution of the lesion and characterized by manifestations of numbness of the fingers and peripheral circulatory disturbances at the initial stage which then passed on to another evolutionary stage by concomitant additional disturbances, first anomalities of the autonomous nervous system and next to dullness of‘ peripheral perception and next to decreasing muscle power. Also we observed the fact that the difference of incidence of the vibration hazards among a population subjected to the same geographical area (meaning under the same conditions of nature and host agents) seems to be due to the difference of the labour conditions enforced and to which it is exposed. Topics: Vibration Syndrome (Vibration-induced White Finger, Bone and Joint; Disrributed Ffects) ; Hand-held Tools ( Chain Saw) ; Vibration Sense ( Threshold ). Note. Copies of all papers included in this section to Vibration Literature Collection at the Institute University of Southampton. The papers may be and, for a small charge, photocopies of them can
will be found in the Human Response of Sound and Vibration Research, The used by persons visiting the Institute usually be provided by post.
Contributions to the Literature Collection are requested from relevant research groups. They should be sent to Dr M. J. Grtjin, Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton, Southampton SO9 5NH, England.