수면정신생리 (Sleep Medicine and Psychophysiology)

  • 제23권2호
  • /
  • Pages.68-76
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  • 2016
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  • 1225-7354(pISSN)
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  • 2713-8631(eISSN)
대한수면의학회 (KOREAN ACADEMY OF SLEEP MEDICINE)
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수면이 균형조절과 시각적 자극 반응시간에 미치는 영향

Effects of Sleep on Balance Control and Reaction Time to Visual Stimuli

  • 박수경 (인제대학교 의생명공학대학 물리치료학과) ;
  • 박정아 (경남대학교 건강과학대학 물리치료학과) ;
  • 박강희 (인제대학교 u-항노화헬스케어연구소) ;
  • 김주헌 (경상대학교 수의과대학 동물의학연구소) ;
  • 홍용근 (인제대학교 의생명공학대학 물리치료학과)
  • Park, Sookyoung (Department of Physical Therapy, College of Biomedical Science & Engineering, Inje University) ;
  • Park, Jung-A (Department of Physical Therapy, College of Health Sciences, Kyungnam University) ;
  • Park, Kanghui (u-Healthcare & Anti-aging Research Center (u-HARC), Inje University) ;
  • Kim, Joo-Heon (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Hong, Yonggeun (Department of Physical Therapy, College of Biomedical Science & Engineering, Inje University)
  • 투고 : 2016.11.05
  • 심사 : 2016.12.15
  • 발행 : 2016.12.31
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초록

목 적 : 수면은 신체의 기능을 회복시키고 항상성을 유지시키는 인체의 필수적인 생리작용으로, 수면의 질 저하는 전반적인 건강문제를 야기 시키는 것으로 보고되고 있다. 따라서 본 연구에서는 수면과 균형조절능력의 관계에 대해 규명하기 위하여, 수면이 균형조절과 시각적 반응시간에 미치는 영향에 대해 알아보고자 하였다. 방 법 : 본 연구에 참여하기를 서면 동의한 건강한 20대 남녀 58명을 대상으로 PSQI를 이용하여 수면의 질을 평가한 다음, PSQI 점수에 따라 대상자를 A군(PSQI <5)과 B군($PSQI{\geq}5$)으로 분류하였다. 이후 대상자들의 체성분과 신체특성, 균형조절, 시각적 반응시간 및 오류횟수를 각각 측정하였다. 결 과 : 수면의 질이 양호한 A군에 비해 수면의 질이 낮은 B군에서 아침기상 시 졸린 정도가 유의하게 높은 것으로 나타났다. 수면이 체성분에 미치는 영향에 대해 알아보기 위해 두 실험군의 신체조성을 비교한 결과, 수면의 질이 낮은 여자 대상자들의 체지방량과 체지방률이 유의하게 낮은 것으로 확인되었다. 또한 수면상태에 따른 균형을 비교한 결과, 유의한 차이가 나타나지 않았지만, 시각적 반응시간에서는 유의한 증가가 확인되었다. 특히 수면의 질이 낮은 B군에서 반응시간은 선형적으로 유의하게 증가하였으며, 오차횟수 역시 증가하는 것으로 나타났다. 결 론 : 수면의 질 저하는 반응속도를 지연시키고, 반응의 정확도를 감소시키는 것으로 나타났는데, 이러한 선택적 주의력의 저하는 균형조절에 영향을 끼칠 수 있고, 이로 인해 예상하지 못한 순간에 낙상 등의 손상을 입을 위험이 증가할 수 있다.

Objectives: To find evidence that sleep is necessary for normal brain function, thus indicating that declines in both sleep quality and quantity are related to worse performance of many daily tasks and deteriorated physical functions. The present study investigates the relationships of balance control and reaction time with sleep quality. Methods: 58 healthy (male 20, female 38) volunteers with informed consent participated in this study. The Self-reported Pittsburgh Sleep Quality Index (PSQI) was used to evaluate sleep quality and relevant factors, and the subjects were divided into groups A (PSQI < 5) and B ($PSQI{\geq}5$) based on this index. Static balance control and reaction time to visual stimuli were conducted to assess their relationship with sleep quality. Results: Group B exhibited excessive daytime sleepiness significantly more often compared to group A. Static balance control did not markedly change relative to sleep quality, but reaction time and error to visual stimuli were significantly increased in group B compared to group A. Conclusion: These findings indicate that a decline in sleep quality can result in delayed reactions, as well as decreased accuracy of these reactions. They also suggest that low sleep quality may be associated with changes in physical functions, including balance control through reduced selective attention.

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