Block 2 anatomy

pec major proximal attachment

Clavicular head: medial clavicle

Sternocostal head: sternum, superior 6 costal cartilages

pec major distal attachment

intertubercle sulcus of humerus

pec major innervation

medial and lateral pectoral n

pec major action

clavicular head: flexes arm sternocostal head: extends arm

together: adduct and medially rotate

pec minor proximal attachment

ribs 3-5

pec minor distal attachment

coracoid process of scapula

pec minor innervation

medial pectoral n

pec minor action

depresses & protracts scapula

serratus anterior proximal attachment

lateral 1-8 ribs

serratus anterior distal attachment

medial border of scapula

serratus anterior innervation

long thoracic nerve

serratus anterior action

protracts scapula

subscapularis proximal attachment

subscapular fossa

subscapularis distal attachment

lesser tubercle of humerus

subscapularis innervation

upper and lower subscapular nerves

subscapularis action

medially rotates arm

coracobrachialis proximal attachment

coracoid process

coracobrachialis distal attachment

medial shaft of humerus

coracobrachialis innervation

musculocutaneous nerve

coracobrachialis action

adduction and flexion of arm

biceps brachii proximal attachment

long head: supraglenoid tubercle
short head: coracoid process

biceps brachii distal attachment

radial tuberosity

biceps brachii innervation

musculocutaneous nerve

biceps brachii action

flexes arm and forearm supinates forearm

brachialis proximal attachment

anterior humerus

brachialis distal attachment

ulnar tuberosity

brachialis innervation

musculocutaneous nerve

brachialis action

flexes forearm

pronator teres proximal attachment

coronoid process of ulna

pronator teres distal attachment

midshaft radis

pronator teres innervation

median nerve

pronator teres action

pronation and flexion of forearm

flexor carpi radialis proximal attachment

medical epicondyle of humerus

flexor carpi radialis distal attachment

base of 2nd and 3rd metacarpal

flexor carpi radialis innervation

median nerve

flexor carpi radialis action

abduction and flexion of wrist

palmaris longus proximal attachment

medial epicondyle of humerus

palmaris longus distal attachment

palmar aponeurosis

palmaris longus innervation

median nerve

palmaris longus action

flexes wrist

flexor carpi ulnaris proximal attachment

medial epicondyle of humerus

flexor carpi ulnaris distal attachment

pisiform

flexor carpi ulnaris innervation

ulnar nerve

flexor carpi ulnaris action

adduction and flexion of wrist

flexor digitorum superficialis proximal attachment

medial epicondyle of humerus

flexor digitorum superficialis distal attachment

middle phalanges of digits 2-5

flexor digitorum superficialis innervation

median nerve

flexor digitorum superficialis action

Flexion of digits 2-5 at MCP and PIP joints
Flexion of wrist

flexor digitorum profundus proximal attachment

interosseous membrane

flexor digitorum profundus distal attachment

distal phalanges of digits 2-5

flexor digitorum profundus innervation

lateral 1/2: median nerve
medial 1/2: ulnar nerve

flexor digitorum profundus action

flexion of digits 2-5 at MCP, PIP, and DIP

flexion of wrist

pronator quadratus proximal attachment

distal ulna

pronator quadratus distal attachment

distal radius

pronator quadratus innervation

median nerve

pronator quadratus action

pronation of forearm

flexor pollicis longus proximal attachment

interosseous membrane

flexor pollicis longus distal attachment

base of distal phalanx of thumb

flexor pollicis longus innervation

median nerve

flexor pollicis longus action

flexes thumb at CMC, MCP, and IP joints

brachioradialis proximal attachment

supracondylar ridge of humerus

brachioradialis distal attachment

styloid process of radius

brachioradialis innervation

radial nerve

brachioradialis action

flexes forearm when protonated

extensor carpi radialis longus proximal attachment

lateral supracondylar ridge of humerus

extensor carpi radialis longus distal attachment

base of 2nd metacarpal

extensor carpi radialis longus innervation

radial nerve

extensor carpi radialis longus action

extends and abducts wrist

extensor carpi radialis brevis proximal attachment

lateral epicondyle of humerus

extensor carpi radialis brevis distal attachment

base of 3rd metacarpal

extensor carpi radialis brevis innervation

radial nerve

extensor carpi radialis brevis action

extends and abducts wrist

extensor digitorum proximal attachment

lateral epicondyle of humerus

extensor digitorum distal attachment

extensor expansions of digits 2-5

extensor digitorum innervation

radial nerve

extensor digitorum action

extends wrist and digits 2-5 at MCP, DIP, IP

extensor digiti minimi proximal attachment

lateral epicondyle of humerus

extensor digiti minimi distal attachment

Extensor expansion of 5th digit

extensor digiti minimi innervation

radial nerve

extensor digiti minimi action

extends 5th digit at MCP

extensor carpi ulnaris proximal attachment

lateral epicondyle of humerus

extensor carpi ulnaris distal attachment

base of 5th metacarpal

extensor carpi ulnaris innervation

radial nerve

extensor carpi ulnaris action

extends and adducts wrist

supinator proximal attachment

lateral epicondyle of humerus

supinator distal attachment

proximal radius

supinator innervation

radial nerve

supinator action

supinates forearm

abductor pollicis longus proximal attachment

posterior surface of ulna

abductor pollicis longus distal attachment

base of 1st metacarpal

abductor pollicis longus innervation

radial nerve

abductor pollicis longus action

abducts thumb at CMC joint

extensor pollicis brevis proximal attachment

Posterior surface of radius

extensor pollicis brevis distal attachment

proximal phalanx of thumb

extensor pollicis brevis action

extend thumb at CMC and MCP joints

extensor pollicis longus proximal attachment

Posterior surface of ulna

extensor pollicis longus distal attachment

distal phalanx of thumb

extensor pollicis longus innervation

radial nerve

extensor pollicis longus action

extends thumb at CMC, MCP, IP

extensor indicis proximal attachment

Posterior surface of ulna