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- Title
A DEVICE FOR ESTIMATING STABILITY OF STANCE IN HUMAN SUBJECTS.
- Authors
Shipley, Robert E.; Harley, R. J.
- Abstract
An apparatus for quantifying the stability of stance of human subjects under several conditions is described. The duration and degree of angular deviation of the S's center of gravity above his standing center of support on a platform are sensed by electro-mechanical means over a selected period of time and the product is converted to arbitrary numerical units. A technique is provided for vibrating the platform upon which the S stands so that kinesthetic or proprioceptive cues from the feet and lower legs are "diluted" by the irrelevant vibratory stimuli. Normal Ss were tested for stability of stance for periods of 20 sec with l) eyes open, 2) eyes closed, 3) eyes open, vibrator on, and 4) eyes closed, vibrator on. In general, instability increased in the order of test 1, 2, 3, and 4 with most Ss, but in some, closing the eyes alone had little effect in reducing stability of stance. The apparatus was designed for use in testing drugs that may affect static balance when each S is used as his own control.
- Subjects
STABILITY (Mechanics); CENTER of mass; ELECTROMECHANICAL devices; VIBRATION (Mechanics); DRUG use testing
- Publication
Psychophysiology, 1970, Vol 7, Issue 2, p287
- ISSN
0048-5772
- Publication type
Article
- DOI
10.1111/j.1469-8986.1970.tb02237.x