muscles (origin/insertion/function) Flashcards
supraspinatus
ROTATOR CUFF origin: supraspinous fossa insertion: greater tubercle primary function: stabilize humerus head secondary function: abducts, laterally rotates
infraspinatus
ROTATOR CUFF origin: infraspinous fossa insertion: greater tubercle primary function: stabilize humerus head secondary function: laterally rotates
teres minor
ROTATOR CUFF orgin: lateral border insertion: greater tubercle primary function: stabilize humerus head secondary function: abducts, laterally rotates
subscapularis
ROTATOR CUFF origin: sub scapular fossa insertion: lesser tubercle primary function: stabilize humerus head secondary function: medially rotates
pectoralis major
SHOULDER MUSCLES
origin: upper is clavicle, lower is sternum + costal cartilage
insertion: lateral lip of bicipital groove
primary function: arm adduction, flexion, internal rotation
latissimus dorsi
SHOULDER MUSCLES
origin: lumber + lower half of thoracic spine, inner iliac crest + sacrum
insertion: bicipital groove
function: arm adduction, extension, internal rotation
deltoid
MOVES HUMERUS (AB duction) origin: -anterior is clavicle -lateral is acromion head, -posterior is lateral scapular spin border insertion: deltoid tuberosity function: -AH: flexes, medially rotates -LH: abducts -PH: extends, laterally rotates
coraco-brachialis
MOVES HUMERUS (AB duction)
origin: coracoid process
insertion: humerus shaft
function: arm flexion, adduction
teres major
MOVES HUMERUS (AB duction)
origin: lateral border
insertion: bicipital groove
function: medially rotates, arm extension, abduction