http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 편효영(Hyo Young Pyeon) (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
갑작스러운 체간 동요 시 좌우 체간근에 나타나는 불균형 패턴
김유신(Yu Shin Kim),편효영(Hyo Young Pyeon),윤범철(Bum Chul Yoon) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.40
The purpose of this study was attempted to identify the pattern of left-right trunk muscles activity when subjects were occurred by sudden and unexpected trunk perturbation and to explore the effect of trunk stability. The study included 19 high school female basketball players whose dominated side is right. All subjects were postured such as a semiseated position on the apparatus which provides stable fixation of knee and hip. They exerted 30% of maximal isometric contraction in trunk flexion, left rotation and right rotation against resisted force from external load. The resisted force was suddenly released when electric current of an electromagnet turns off. At the same time, EMG(electromyography) signal from 4 trunk muscles(rectus abdominis, external oblique, internal oblique and L4-5 multifidus) and perturbation angle from 3D motion analysis system were recorded. The results were as follows: 1. Although left and right muscle activities were estimated imbalanced when subjects performed isometric contraction, the perturbation angles of sudden and unexpected perturbation of trunk weren`t significantly different(p>.05). 2. directional variations of perturbational angles on flexion-extension, left-right rotation and right-left rotation had the correlation significantly(p<.05). Especially, left-right rotation and right-left rotation had a high correlation(r=.778). 3. When subjects were occurred by sudden and unexpected perturbation, internal oblique muscle on left side had greater reflexive activities than right side regardless of directionality(p<.05). These results suggest that imbalance of trunk muscle contraction in the postural control of the one-side dominated person in the sudden and unexpected perturbation occurs regardless of directionality. It is maybe caused by not only long latency reflex from brain network rather than stretch reflex but also motor programs saved for anticipatory postural adjustments. And trunk perturbation angles are rarely affected imbalance level of left-right trunk muscle activities.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
