upper extremity muscles

pectoralis minor action

stabilize scapula, protract and depress shoulder girdle

pectoralis minor origin

ribs 3-5 near costal cartilages

pectoralis minor insertion

coracoid process

pectoralis minor innervation

medial pectoral nerve C8-T1

pectoralis major action

coronal and horizontal adduction, IR humerus

clavicular head of pectoralis major action

flex extended humerus

sternocostal head of pectoralis major action

extend flexed humerus

clavicular head of pectoralis major origin

anterior clavicle

sternocostal head of pectoralis major origin

anterior sternum, superior 8 costal cartilages

pectoralis major insertion

lateral intertubercular groove

pectoralis major innervation

medial and lateral pectoral nerves C5-T1

subclavius action

anchor and depress clavicle, reinforce SC joint

subclavius origin

rib 1 and costal cartilage

subclavius insertion

inferior clavicle

subclavius innervation

nerve to subclavius C5-C6

coracobrachialis action

adduction, flexion, little IR humerus, stabilize against traction forces

coracobrachialis origin

coracoid process

coracobrachialis insertion

anteromedial humerus

coracobrachialis innervation

musculocutaneus nerve C5-C7

deltoid (with 3 regions) action

abduct shoulder

anterior head of deltoid action

flex ad IR arm

middle head of deltoid action

abduct arm

posterior head of deltoid action

extend and ER arm

deltoid origin

lateral 1/3 clavicle, scapular spine, acromion process

deltoid insertion

deltoid tuberosity of humerus

deltoid innervation

axillary nerve C5-C6

what muscles are part of the rotator cuff

supraspinatus, infrasinatus, teres minor, subscapularis

supraspinatus action

abduct, flex, ER humerus

supraspinatus origin

supraspinous fossa

supraspinatus insertion

greater tubercle

supraspinatus innervation

suprascapular nerve C5-C6

infraspinatus action

ER humerus

infraspinatus origin

infraspinatus fossa

infraspinatus insertion

greater tubercle

infraspinatus innervation

suprascapular nerve C5-C6

teres major action

adduction, IR, extension of humerus

teres major origin

inferior lateral border of scapula

teres major insertion

medial intertubercular groove

teres major innervation

lower subscapular nerve C5-C6

teres minor action

ER and adduction of humerus

teres minor origin

middle lateral border of scapula

teres minor insertion

greater tubercle

teres minor innervation

axillary nerve C5-C6

subscapularis action

IR humerus, stabilize GH joint anteriorly

subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle

subscapularis innervation

upper and lower subscapular nerves C5-C7

biceps brachii action with extended elbow

flex elbow and shoulder

biceps brachii action with elbow flexed, forearm supinated

flex elbow

biceps brachii action with elbow flexed, forearm pronated

supinate forearm

long head of biceps brachii origin

labrum, supraglenoid tuberosity

short head of biceps brachii origin

coracoid process

biceps brachii insertion

radial tuberosity

biceps brachii innervation

musculocutaneous nerve, primarily C6

brachialis action

flex forearm regardless of position

brachialis origin

anterior distal humerus

brachialis insertion

coronoid process

brachialis innervation

musculocutaneous nerve C5-C6, some radial nerve

brachioradialis action

flex neutral forearm

brachioradialis origin

lateral supracondylar ridge of humerus

brachioradialis insertion

distal radius

brachioradialis innervation

radial nerve, primarily C6

triceps brachii action

elbow extension

long head of triceps brachii action

extend and adduct shoulder, stabilize humeral head

long head of triceps brachii origin

infraglenoid tubercle

lateral head of triceps brachii origin

posterior humerus above radial groove

medial head of triceps brachii origin

posterior humerus below radial groove

triceps brachii insertion

olecranon of ulna

triceps brachii innervation

radial nerve - primarily C7

anconeous action

elbow extension, stabilize joint, glide ulna in pronation

keep capsule from pinching

anconeous origin

lateral epicondyle of humerus

anconeous insertion

lateral olecranon, superior posterior ulna

anconeous innervation

radial nerve - primarily C7

pronator teres action

pronate and flex forearm at elbow

ulnar head of pronator teres origin

coronoid process

humeral head of pronator teres origin

medial epicondyle of humerus

pronator teres insertion

lateral radius - proximal third

pronator teres innervation

median nerve - primarily C7

flexor carpi radialis action

radial deviation, flex hand and forearm

flexor carpi radialis origin

medial epicondyle

flexor carpi radialis insertion

base of 2nd metacarpal

flexor carpi radialis innervation

median nerve - primarily C7

flexor carpi ulnaris action

ulnar deviation, flex hand

humeral head of flexor carpi ulnaris origin

medial epicondyle

ulnar head of flexor carpi ulnaris origin

proximal ulna

flexor carpi ulnaris insertion

pisiform, hook of hamate, 5th metacarpal

flexor carpi ulnaris innervation

ulnar nerve - primarily C8

palmaris longus action

flex hand, minor wrist flexion

palmaris longus origin

medial epicondyle

palmaris longus insertion

palmar aponeurosis, flexor retinaculum

palmaris longus innervation

median nerve C6-T1

flexor digitorum superficialis action

flex proximal IP joints and MCP joints

humeroulnar head of flexor digitorum superficialis origin

medial epicondyle and coronoid process

radial head of flexor digitorum superficialis origin

anterior proximal radius

flexor digitorum superficialis insertion

middle phalanges 2-5, two tendon slips

flexor digitorum superficialis innervation

median nerve C6-T1

flexor digitorum profundus action

flex distal IP joints

flexor digitorum profundus origin

anterior ulna, interosseous membrane

medial part of flexor digitorum profundus insertion

bases of 4th and 5th distal phalanges