Rotator Cuff Muscles and Others that Move the Arm Flashcards
Supraspinatus origin
supraspinous fossa
Supraspinatus insertion
greater tubercle of humerus
Supraspinatus nerve
suprascapular
Supraspinatus action
abducts arm (reach to back of head)
Infraspinatus origin
infraspinous fossa
Infraspinatus insertion
greater tubercle of humerus
Infraspinatus nerve
suprascapular
Infraspinatus action
extends and laterally rotates arm
Teres minor origin
middle 1/3 of lateral border of scapula
Teres minor insertion
greater tubercle of humerus
Teres minor nerve
axillary
Teres minor action
adducts and extends and laterally rotates arm
Subscapularis origin
subscapular fossa
Subscapularis insertion
lesser tubercle of humerus
Subscapularis nerve
subscapular (upper and lower)
Subscapularis action
rotates arm medially (toward belly)
Latissimus dorsi origin
spinous process of T7-12, L1-5, median ridge of sacrum and iliac crest (overlaps with trapezius T7-12; trapezius is superficial; occasionally originates at inferior scapula)
Latissimus dorsi insertion
crest of lesser tubercle of humerus
Latissimus dorsi nerve
thoracodorsal
Latissimus dorsi action
adduct, extend, medially rotate arm
Teres major origin
inferior 1/3 of lateral border of scapula
Teres major insertion
crest of lesser tubercle humerus
Teres major nerve
lower subscapular
Teres major action
adducts, extends, medially rotates arm
Deltoid origin
lateral clavicle, acromion process, spine of scapula
Deltoid insertion
deltoid tuberosity
Deltoid nerve
axillary
Deltoid action
abduct, flex, extend, and rotate arm
Coracobrachialis origin
coracoid process
Coracobrachialis insertion
mid medial border of humerus
Coracobrachialis nerve
musculocutaneous
Coracobrachialis action
adducts and flexes arm
