KIN 361 Lecture Notes - Lecture 10: Vastus Intermedius Muscle, Vastus Medialis, Vastus Lateralis Muscle
Document Summary
There are three hamstring muscles: semitendinosus, semimembranosus, biceps femoris. The hamstring muscle group helps to extend the leg straight back and bend your knee. Hamstring strain can be a pull, a partial tear or a complete tear. Occurs if any of the tendons/muscles are stretched beyond their limit (muscle overload) The muscle is lengthened and loaded with body weight and the force required for forward motion. Occur during sudden/explosive moments (ex. sprinting, jumping, high kick, etc. ) Thigh injuries: hamstring strain: origin pull: mx, ipsilateral/contralateral strength imbalance, agonist/antagonist strength imbalance, poor joint. Proprioception: lack of flexibility, overuse (pelvic shift, sx, pain with deceleration, pain @ ischial tuberosity, loss of function, tx, s&s, rehab at high angular velocities, compression sleeve. Check the thigh for tenderness or bruising. Palpate, press the back of the thigh to see if there is pain, weakness, swelling. Quad muscles consist of: vastus lateralis, vastus medialis, vastus intermedius, rectus femoris (most common)
