Accession Number : AD0666749

Title :   EFFECT OF D-TUBOCURARINE ON THE SCALING OF EFFORT OF ISOMETRIC MUSCLE CONTRACTIONS.

Descriptive Note : Progress rept.,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Smith,Richard P. ; Caldwell,Lee S. ; Thomas,Donald M.

Report Date : 07 FEB 1968

Pagination or Media Count : 13

Abstract : The purpose of this study was to determine whether the alteration in voluntary strength produced by d-tubocurarine, and the consequent reduction in feedback from the muscles, would distort a subject's normal reference for judging the effortfulness of a task, and change the slope of the effort function. The effort function obtained with d-tubocurarine was not significantly different from those secured in the normal and placebo conditions. Thus, it was concluded that the motor units remaining functional after the administration of d-tubocurarine fatigue normally, and that the slope of the effort function is determined by the relative rather than the absolute number of motor units required to maintain the contraction. (Author)

Descriptors :   (*CURARE ALKALOIDS, *PSYCHOPHYSIOLOGY), STRENGTH(PHYSIOLOGY), PERCEPTION(PSYCHOLOGY), MUSCLES, CONTRACTION, FATIGUE(PHYSIOLOGY), PERCEPTION, ENDURANCE(PHYSIOLOGY)

Subject Categories : Psychology
      Anatomy and Physiology
      Pharmacology

Distribution Statement : APPROVED FOR PUBLIC RELEASE