Abstract
This study examined the influence of subjective visual vertical (SVV) on sitting postural control in patients with cerebral vascular accident. SVV of right hemiplegic subjects (n=7), left hemiplegic subjects (n=8), healthy young subjects (n=9), and healthy elderly subjects (n=4) were measured as well as the mean tilt angle of the body axis and vertical line when the subjects adjusted their body axis to an oblique target line. The CVA groups showed significant small values in the tilt angle of the body compared to the healthy groups. Statistical analysis indicated that there were no significant correlation between the severity of hemiplegia and the tilt angle of body. The standard deviation (SD) of SVV was significantly large in the left hemiplegic group. Furthermore, there was a tendency for the SD of SVV to be large in left hemiplegic group when the body tilted toward the left side. These results suggest that there is a tendency for the SD value of SVV in left hemiplegic group to be larger than that of the other groups and that this might influence the amplitude of the body axis when the body is tilted.
