The Influence of Force Magnitude on the Perception of Body Position

With rotation in the sagittal plane, deviations of the perceived from the trained body position were measured at force magnitudes of 1·0, 1·4 and 1·8 g. In Expt. I body postures with corresponding utricular macular orientations in the region of 40° and 10° backward and 20° forward were examined. In the two backward positions the judgements were displaced forward with increased force operating, whereas a backward shift was produced for the forward utricular orientation. The results support the hypothesis that the position in which the body is perceived is related to the utricular shear force. In Expt. II body postures were investigated which involved orientations of the utricular maculae of about 70°, 90° and 110° backward. The small shifts in judgements produced at increased force magnitudes were not significant. It appears that the above hypothesis is only valid for shear values up to 1·0 g , and this may represent the physiological limit of the statolith system with respect to judgements of body position

Astrophysics · Audiology · Body position · Classical mechanics · Geodesy · Geometry · Magnitude (astronomy) · Orientation (vector space) · Perception · Physical medicine and rehabilitation · Physics · Position (finance) · Sagittal plane · Shear force · Anatomy · Balance, Gait, and Falls Prevention · Communication · Geology · Healthcare Technology and Patient Monitoring · Mathematics · Medicine · Neuroscience · Psychology · Spaceflight effects on biology