Body reactions during chain saw work.

Abstract

Body reactions during chain saw work were studied in 14 subjects. The subjects divided into three groups (control, sulpiride, and propranolol) possibility of vibration disease and cardiovascular diseases. None complained of Raynaud's phenomenon in the fingers, but some had slight numbness in the fingers and arms, palmar hyperhydrosis, or shoulder stiffness. The cumulative operation time was from 0920 to 1690.The subjects were divided into three groups: group I consisted of six control subjects, group 2 of four men with intramuscular premedication of 100 mg sulpiride, one of the benzamide derivatives, and group 3 of four men who received 20 mg propranolol administered by mouth. No significant differences were noted between these three groups.As shown in fig 1, the experimental procedures are as follows. Firstly, after explaining the experimental purposes and procedures to all the subjects, laboratory examinations were performed: electrocardiograms (12 limb and precordial leads), blood pressure, digital plethysmography with auditory stimuli for detecting the sympathetic nervous tones,67 and blood sampling. Blood chemistry included estimations of adrenocorticotropic hormone (ACTH), cortisol, adrenaline, noradrenaline, and dopamine concentrations. A second examination was then made after the administration of sulpiride or propranolol. After these procedures, the subjects operated chain saws for seven minutes. Electrocardiographic recordings with a bipolar lead on the chest and the electroencephalographic recordings with two monopolar leads from left and right frontal poles were made during the successive cutting of logs with a chain saw. 667

Dependence of palmar sweating response and central nervous system activity on the frequency of whole-body vibration

“…Two mechanisms have been suggested to induce a palmar sweating response as a result of such stress. One is associated with the central sympathetic nervous system (14) and the other with the sympathetic reflex (15). The changes in the saliva MHPG concentration observed in our study indicate that the palmar sweating response to whole-body vibration is probably due to the activation of the central sympathetic nervous system.…”

Neuromuscular and hormonal responses to a single session of whole body vibration exercise in healthy young men

“…An elevated salivary cortisol concentration appeared to be only a transient effect as the trend showed a steady decline during the 2 h period after WBV. Previous studies have shown that cortisol responses to vibration and acceleration load are quite marked in humans (Matoba et al. , 1985) and animals (Perremans et al.…”

Effect of cold ambient temperature on palmar sweating response to vibration stress

“…Vibration as a stressor may excite the higher centres of the sympathetic nervous system in the hypothalamus (Matoba et al 1985). In addition, vibration stress is thought to induce palmar sweating through the somatosympathetic reflex (Sato and Schmidt 1973).…”