근 길이에 따른 근 섬유 동원율의 차이

• 영문명: The Effect of the Muscle Firing Rate on Muscle Length
• 발행기관: 한국전문물리치료학회
• 저자명: 송영희(Song Young-hee) 정이정(Chung Yi-jung) 조상현(Cho Sang-hyun)
• 간행물 정보: 『한국전문물리치료학회지』한국전문물리치료학회지 제11권 제3호, 85~90쪽, 전체 6쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2004.09.30

영문 초록

The purpose of this study was to find the difference in muscle firing rate between each muscle according to the knee angle with the quadriceps femoris which is a representative action muscle of the lower extremity. Seven normal healthy subjects were recruited. The median frequency (MDF) of muscle contraction was recorded from vastus lateralis, vastus medialis, and rectus femoris muscles using the surface EMG, in 5 seconds, during maximal isometric knee extension. The data were analyzed by the two-way repeated ANOVA. The results of the study were as follows: (1) median frequency of muscle contraction was significantly higher at the vastus lateralis, vastus medialis, and rectus femoris in descending order. (2) median frequency of muscle contraction was significantly higher at the 30°, 60°, and 90° in descending order. Consequent1y, muscle recruitment at the knee decreases the EMG activity of the lengthened muscle. This study suggests that the change in EMG activity at different muscle lengths resulted in affecting the muscle firing rate during the knee extension.

목차

Abstract

Ⅰ. 서론

Ⅱ. 연구방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

인용문헌

키워드

Knee Muscle firing rate Muscle length