Upper Extremity Muscles Flashcards
Trapezius origin
occipital bone, spinous process
Trapezius insertion
scapular spine, acromion, distal clavicle
Trapezius action
elevate, depress, adduct scapula
Rhomboids origin
spinous process
Rhomboids insertion
medial border of scapula
Levator scapulae origin
transverse process
Levator scapulae insertion
superior angle of scapula
Levator scapulae action
elevate scapula
Pectoralis minor origin
ribs
Pectoralis minor insertion
coracoid process of scapula
Pectoralis minor action
depress scapula
Serratus anterior origin
ribs
Serratus anterior insertion
medial border of scapula
Serratus anterior action
abduct scapula
Pectoralis major origin
sternum and clavicle
Pectoralis major instertion
greater tubercle of humerus
Pectoralis major action
flex and adduct arm
Coracobrachialis origin
coracoid process of scapula
Coracobrachialis insertion
proximal humerus
Coracobrachialis action
flex and adduct arm
Lastissimus dorsi origin
spinous process, iliac crest
Lastissimus dorsi insertion
lesser tubercle of humerus
Lastissimus dorsi action
extend and adduct arm
Teres major origin
inferior angle of scapula
Teres major insertion
lesser tubercle of humerus
Teres major action
extend and adduct arm
Deltoid origin
scapular spine, acromion, clavicle
Deltoid insertion
deltoid tuberosity of humerus
Deltoid action
abduct, flex, and extend arm
4 rotator cuff muscles
supraspinatus, infraspinatus, teres minor, subscapularis
Supraspinatus origin
supraspinatus fossa of scapula
Infraspinatus origin
infraspinatus fossa of scapula
Teres minor origin
lateral border of scapula
Rotator cuff muscles insertion
greater tubercle of humerus
Supraspinatus action
abduct arm
Infraspinatus and teres minor action
laterally rotate arm
Subscapularis origin
subscapular fossa of scapula
Subscapularis insertion
lesser tubercle of humerus
Subscapularis action
medially rotate arm
Biceps brachii origin
long head: above glenoid fossa short head: coracoid process of scapula
Biceps brachii insertion
radial tuberosity of radius (spans 2 joints!)
Biceps brachii action
flex and supinate forearm
Brachialis origin
distal humerus
Brachialis insertion
proximal ulna
Brachialis action
flex forearm
Brachioradialis origin
distal lateral humerus
Brachioradialis insertion
styloid process of radius
Brachioradialis action
flex forearm
Triceps brachii lateral head origin
lateral surface of humerus
Triceps brachii long head origin
below glenoid fossa
Triceps brachii medial head origin
posterior surface of humerus
Triceps brachii insertion
olecranon process of ulna
Triceps brachii action
extend forearm
Pronator teres and pronator quadratus origin
ulna
Pronator teres and pronator quadratus insertion
radius
Pronator teres and pronator quadratus action
pronate forearm
Supinator origin
proximal ulna
Supinator insertion
proximal radius
Supinator action
supinate forearm
Forearm flexors origin
medial epicondyles of humerus, radius, ulna
Forearm flexors insertion
carpals, metacarpals, phalanges
Forearm flexors action
flex wrist, fingers, thumb
Forearm extensors origin
lateral epicondyles of humerus, radius, ulna
Forearm extensors insertion
carpals, metacarpals, phalanges
Forearm extensors action
extend wrist, fingers, thumb, abduct thumb
Intrinsic muscle of the thumb
thenar
Intrinsic muscle of the pinky
hypothenar