Kinesiology 2241A/B Lecture Notes - Lecture 6: Rectus Femoris Muscle, Vastus Medialis, Biceps

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Gwen Jenkins

Document Summary

If your going around a tight angle on the outside a sesamoid bone is needed. If you tear the muscle it is most likely to tear the tendon from the bone if you follow the muscle it connects straight through to the tendon. If you go longer then it wants to be you are pulling actin away from fingers so they can"t produce power: understand ye chart on slide 10. So(cid:373)e (cid:373)us(cid:272)les (cid:449)ill o(cid:374)ly (cid:858)(cid:272)ross(cid:859) o(cid:374)e joi(cid:374)t: therefore they only affect one joint when they contract, these are uniarticulate or one-joint muscles, example: soleus in the calf group of muscles, only crosses the ankle. Some muscle cross two or more joints: they will affect several joints simultaneously when they contract, these are multiarticulate or multi-joint muscles, example: gastrocnemius in the calf group of muscles, crosses the ankle and knee. When a muscle is activated by the motor nerve, the sarcomeres attempt to shorten.