KINESIOL 1Y03 Lecture Notes - Lecture 13: External Intercostal Muscles, Defecation, Porton

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 1Y03
• Professor: Krista Howarth

Document Summary

Muscle terminology: origin or head: muscle end attached to more stationary of two bones. Almost all the bones attach to two different bones. Tends to be more proximal when we talk about the limbs o. Insertion: muscle end attached to bone with greatest movement. Typically more distal: belly: largest portion of the muscle between origin and insertion. Some muscles can have multiple bellys, and some have multiple origins. Tendons: attach muscles to bones: aponeurosis: a very broad tendon. Agonist: muscle that, when it contracts, causes an action. Antagonist: a muscle working in opposition to agonist. Synergists: muscles that work together to cause a movement: prime mover: plays major role in accomplishing movement, fixators: stabilize joint/s crossed by the prime mover; prevent movement of the origin of the prime mover. Example: the scapula is floating on our back. For our arms to move, we need the scapula to be fixed in place.