Kinesiology 2241A/B Lecture 6: Lecture 6

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

Muscle produces motion when creates tensions + tries to shorted. Attachments + orientation determine what moves + how. Goes around bony land mark (wrapping) = changes direction. Different alignment of fibers w/in muscle - shows direction. Different sizes (lg or sm) of then tendon attachments at either end. Quad (4 parts) - all attach to kneecap. Each head has different angles of fibers + direction of pull of muscle. Muscle wrapping points or retinacula for redirecting muscle pull b/w origin + insertion. Wrapping point: where it goes +vely over bone. Extensor hallius longus - dorsiflexes, goes around/wraps ankle bone. Retinacula hold muscle down (-ve) doesn"t allow muscle to straighten. Muscles attach bone to tendon or "aponeuroses (wide band of connective tissue) Architecture of the cells is important - affects function. 1m long in length - mircoscopic in other dimensions (width) This is why cells have multi nuclei (helps w/ communication)