KINESIOL 1A03 Lecture Notes - Lecture 20: Acromion, Defecation, Rhomboid Muscles

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 1A03
• Professor: Krista Howarth

Document Summary

The muscle end that attaches to the more stationary of 2 bones: tends to be more proximal, e. g. The muscle end attaches to a bone with the greatest movement: tends to be more distal, e. g. The largest portion of the muscle between the origin and insertion. The muscle causes an action when it contracts. Muscles that work together to cause a movement. Plays the major role in accomplishing movement. Stabilizes joints that are crossed by the prime mover: also prevents movement from the origin of the prime mover, e. g. Location: pectoralis a muscle located in the chest, gluteus a muscle located in the buttock, brachial a muscle located in the arm. Size: maximus/major the largest muscle, minimis/minor the smallest muscle, longus the longest muscle, brevis the shortest muscle. Shape: deltoid triangle shape, quadratus square shape, teres rounded shape, trapezius trapezoid shape. Action/ function: flexor, extensor, abductor, adductor, masseter.