直立姿勢維持に対する視覚・体性感覚の影響について
スポンサーリンク
概要
- 論文の詳細を見る
The various influences on posture of visual and somatosensory conditions were analyzed in 15 normal subjects with the use of the EquiTest and optokinetic stimulation. Two types of somatosensory input were used: a static support surface and a moving surface coordinated with the anterior-posterior (A-P) sway of the subject. Four types of visual input were applied in each somatosensory condition: (1) eyes open, (2) eyes closed, (3) movement of visual surroundings coordinated with A-P sway, (4) horizontal optokinetic stimulation. On the static support surface, the center of gravity (COG) was very stable with eyes open and with optokinetic stimulation. The COG was less stable when the eyes closed, and the least stable when the visual surroundings were moving. The FFT in the A-P direction under static somatosensory conditions showed characteristic changes when the visual surroundings were moving: a significant increase of power in the frequency range below 0.25 Hz, a decrease between 0.25 and 0.5 Hz. Although no significant change in lateral direction was observed, the power under optokinetic stimulation seemed to be 10% greater in the range of 0.25-0.5 Hz than it was under the three other visual conditions.<BR>On a moving support surface, however, COG stability was severely disturbed under all visual conditions except with the eyes open. Furthermore, FFT showed no differences when the subject was standing on a moving support surface. We concluded that sensory conflict caused by moving visual surroundings affects postural stability more than do the other visual conditions tested in our experiment. However, sensory conflict caused by the reduction of somatosensory information results in more severe instability than that caused by any of the visual conditions. These findings confirm the importance of sensory information for postural stability in humans.
論文 | ランダム
- 奈良教育大学広報誌ならやま
- 「九州各地に分布する火山」の教材開発の試み : 新学習指導要領がねらう「思考力・判断力・表現力」の育成に視点を置いて
- 立地条件による学校林の相違と地域社会の関係 : 2001 年学校林現況調査の結果から
- アートセラピーによるメンタルケア : 子どもの危機に対応するケアのネットワークに向けて
- 朝鮮後期仏殿内儀式の盛行と仏像の造形性 宋殷碩:〓〓 〓〓佛殿〓儀式〓 〓〓〓佛像〓造形性 [美術史〓研究263,"0909",pp.71-97](建築歴史・意匠,文献抄録)