시각장애 청소년의 자세동요 감소에 미치는 손끝 가벼운 접촉의 유효성
Effectiveness of Fingertip Light Contact in Reducing Postural Sway in Blind Juveniles
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시각장애 청소년은 시각의 차단으로 체감각과 전정감각이 매우 중요한 역할을 하고 있으며, 정안 청소년과 비교하여 자세동요가 증가되어 있다. 본 연구에서는 시각장애 청소년의 자세동요 감소를 위한 손끝 가벼운 접촉의 유효성을 알아보고자 하였다. 시각장애 청소년 22명과 정안 청소년 22명을 대상으로 하였으며 힘판 위에 두발모아서기자세로 세운 후 비접촉과 손끝 가벼운 접촉으로 이루어진 2중 과제를 무작위로 시행하여 자세동요 거리와 속도를 구하였다. 그 결과 손끝 가벼운 접촉 후 시각장애 청소년과 정안 청소년의 자세동요 거리와 속도는 유의하게 감소하였다(p < .05). 집단 간의 차이는 나타나지 않았으며 접촉여부와 집단의 상호효과도 없었다. 결론적으로 손끝 가벼운 접촉은 시각장애 청소년의 자세동요 감소에 효과가 있으며 시각장애 청소년의 균형개선을 위한 중재 방법의 기초 자료가 되리라 기대한다.
Abstract
Blind juveniles control postural sway with the residual systems, consisting of the somatosensory and vestibular systems. Balancing ability in blind juveniles is worse than sighted juveniles. Purpose of this study were to investigate the differences in postural sway between blind juveniles and sighted juveniles and to examine effectiveness of fingertip light contact in reducing postural sway. Twenty two blind juveniles and twenty two sighted juveniles were tested while standing on a force platform under two conditions; no contact(NC), fingertip light contact(FLC) were applied in a random order. Center of pressure displacements were recorded by using a force platform. Postural sway was measured by sway path and sway velocity. FLC resulted in decreased postural sway in the blind and sighted juveniles(p<.05). Interestingly, this stabilizing effect was more accentuated in the blind juveniles. In conclusion, results suggest that the contribution of the haptic cues from the FLC for regulating postural sway increases in blind juveniles. These findings could be the basis of intervention method for improving balance in blind juveniles.
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