UL1 & UL2 - Actions of Muscles Flashcards
cause you suck at them
the pectoralis major consists of two heads - sternocostal & clavicular. what are the actions of each of these heads on their own? what happens when they work together?
sternocostal head = shoulder extension - pulls humerus down
clavicular head = shoulder flexion
both heads = adduction & medial rotation of shoulder
action of pectoralis minor?
- depresses shoulder
- stabilises scapula against posterior thoracic wall
action of serratus anterior?
action of subclavius?
action of latissimus dorsi?
action of levator scapulae?
the trapezius muscle consists of 3 parts - descending, transverse, ascending. what are the individual actions of these parts? action when they work together?
action of rhomboids minor & major?
latissimus dorsi & teres major muscles have the same action - what is this?
extension, adduction & medial rotation of shoulder joint
action of supraspinatus?
action of infraspinatus?
action of subscapularis?
action of teres minor?
action of teres major?
the deltoid muscle consists of 3 heads - clavicular, acromial & scapular? what are the actions of each of these heads individually? together?
two scapulohumeral muscles contribute to shoulder abduction - which two? how?
supraspinatus - first 15 degrees of arm abduction
deltoid - takes over, does the rest of arm/ shoulder abduction (humerus goes laterally)
the axillary nerve passes out through the quadrangular space & gives off terminal branches that innervate two scapulohumeral muscles - which two?
teres minor
deltoid
biceps brachii has a long & short head - what is there action collectively?
action of coracobrachialis?
action of rbachialis?
triceps brachii has a long, lateral & medial head - what is their collective action?
action of anconeus?
