PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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The Effect of Visual Deprivation on Trunk and Lower Extremity Muscle Activity on an Unstable Surface

불안정면에서 시각차단이 체간과 하지의 근활성도에 미치는 영향

  • Han, Jin-Tae (Department of Physical Therapy, Kyungsung University)
  • 한진태 (경성대학교 물리치료학과)
  • Received : 2018.10.29
  • Accepted : 2018.11.15
  • Published : 2018.12.31
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Abstract

Purpose: Visual information is one of the most important factors for postural balance. The purpose of this study was to investigate the effect of visual deprivation on the lower extremities and trunk muscle activity on an unstable surface during quiet standing. Methods: Fifteen healthy males from a university population participated in this study. Surface electromyography of the rectus abdominis, the erector spinalis, the vastus femoris oblique, the semitendinosis, the tibialis anterior, and the medial gastrocnemius was measured using EMG equipment (Telemyo 2400, Noraxon, USA). The participants were asked to maintain postural balance on an unstable surface (Balance pad, Airex, USA) for 30 seconds with eyes open and with eyes closed during quiet standing. The Wilcoxon test was used to compare the muscle activity of the lower extremities and the trunk between open and closed eyes on an unstable surface. Results: The muscle activity of the trunk and the lower extremities was increased more with eyes closed than with eyes open on the unstable surface during quiet standing. Conclusion: The findings from this study suggest that visual information could alter lower extremity and trunk muscle activity. Therefore, visual deprivation can be used as a method to improve postural balance.

Keywords

Table 1. General characteristics of subjects(mean±SD)

GOSOBJ_2018_v16n3_433_t0001.png 이미지

Table 2. Comparison of muscle activity of trunk with eyes open and close (mean ±SD) (unit: %RVC)

GOSOBJ_2018_v16n3_433_t0002.png 이미지

Table 3. Comparison of muscle activity of lower extremity with eyes open and close(mean ±SD)(unit: %RVC)

GOSOBJ_2018_v16n3_433_t0003.png 이미지

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