視覚障害者の直立姿勢制御に関する研究 [in Japanese] POSTURAL CONTROL OF THE VISUALLY HANDICAPPED IN MAINTAINING THE UPRIGHT STANDING POSTURE [in Japanese]
Access this Article
Search this Article
It is well known that the center of gravity in human being moves irregularly during standing. Visual, vestibular and proprioceptive information play important roles in controling the upright posture. This study examined postural controllabilities of the visually handicapped in maintaining the upright standing posture. Body sway of 15 sighted, 7 partially sighted and 4 totally blind male adults was measured with a gravicorder which consisted of lateral and antero-posterior directions. The data obtained under eyes open and eyes closed conditions fed into computer and were applied power spectral analysis. The results were as follows: 1) The sighted showed that peak power of lateral sway existed in 0.5 Hz during standing with eyes open and power spectra ranging from 0.1 Hz to 0.5 Hz were increased markedly during standing with eyes closed. The sighted also revealed that variance of power spectra in antero-posterior direction was larger at the frequencies between about 0.1 Hz and 0.5 Hz than at the frequencies between 0.5 Hz and 3 Hz. 2) Power spectra in lateral and antero-posterior directions during standing with eyes open in the partially sighted showed the same tendency as with eyes closed. The partially sighted showed larger power than the sighted. 3) There was tendency to show that power spectra of the totally blind did not differ from those of the partially sighted. It was shown that body sway of the totally blind had no particular power spectra. It seemed that poor postural controllabilities of the visually handicapped resulted in shortage of motor experience as well as lack of visual information.
- The Japanese Journal of Special Education
The Japanese Journal of Special Education 18(4), 1-10, 1981
The Japanese Association of Special Education