MOVESCI 230 Lecture Notes - Lecture 20: Hamstring, Quadriceps Femoris Muscle, Lumbar Vertebrae

• School: U of M
• Department: Movement Science
• Course: MOVESCI 230
• Professor: Melissa Gross

Document Summary

Gait cycle: deined by foot contact events of 1 foot only, stance phase, the foot has contacted the ground and the contralateral foot is swinging, 60% of gait cycle c. In muscle movement graph: downward curve/slope is extension, upward curve/slope is lexion, during stance phase, hips are extending, knees are (overall) extending, begins by lexing (referred to as yield) then extends. 2: ankle is (overall) dorsilexion, begins with plantarlexion. 3. stabilizes then plantarlexion again: during swing phase, hips are lexing, knees, begin by lexion, extends back to 0 , ankle, dorsilexion. Control of hip movement: hip extensors act concentrically during stance; eccentrically during swing, hip lexors act eccentrically during stance; concentrically during swing. Vi: hamstrings are synergisic with gluteus maximus at the beginning of stance and end of swing. Control of knee movement: knee extensors act eccentrically then concentrically during stance, flexors act eccentrically during swing.