BIOSC-139 Lecture Notes - Lecture 31: Deltoid Tuberosity, Pronator Quadratus Muscle, Latissimus Dorsi Muscle

• School: Diablo Valley College
• Department: Biological Science
• Course: BIOSC-139
• Professor: Miller

Document Summary

Flex, adduct humerus, medro, humerus, assis scapula protraction. Origin- broad; anterior clavicle, sternum, costal cartilages, aponeurosis external oblique. Superificial muscle of the back but action is on upper arm. Can flex, extend, medially rotate, or abduct arm depending on which fibers are active. Superior and act on /aroundt the glenoid fossa. Triceps brachii (long head) extenders of humerus. Teres major- adduct, medial rotation of humerus. Spaces enclosed by fasciae called intermuscular septa. Emergency procedure- reduces compression of nerves, vessels within a damaged compartment. Infection wound stays open for several days. Does most of the work because of position. Elbow flexer only when in partial pronated position. Not useful as arm flexer until thumbs up. Extension of elbow & adduction/extension at shoulder. Actions of the rotator muscles on the forearm. Muscles that move the wrist/hand flexors. Understand there are two layers of muscle tissue. Appreciate we have two layers of extensors and flexors. Each of the joints in our hand.