Anatomy week 2 - combined

Biceps Brachii

2 heads - long head = lateral; short head = medial

Long head bicep brachia origin

superior rim of glenoid fossa

Long head bicep brachia insertion

radial tuberosity

Long head of bicep brachia action

flexion of supinated forearm; supination of flexed forearm

Long head of bicep brachia innervation

Musculocutaneous n.

Short head bicep brachia origin

corocoid process of scapula

short head bicep brachia insertion

radial tuberosity

short head bicep brachia action

flexion of supinated arm; supination of flexed arm

short head bicep brachia innervation

musculocutaneous n.

coracobrachialis origin

corocoid process of scapula

coracobrachialis insertion

medial side of humerus

coracobrachialis action

flexion and adduction of arm

coracobrachialis innervation

musculocutaneous n.

brachialis origin

anterior surface of humerus

brachialis insertion

coronoid process of ulna

brachialis action

flexion of forearm

brachialis innervation

musculocutaneous

Triceps brachii

lateral head - most lateral; medial head - beneath lateral head; long head - most medial

lateral head triceps origin

posterior surface of humerus above spiral groove

lateral head triceps insertion

olecranon

lateral head triceps action

extension of forearm

lateral head triceps innervation

radial n.

medial head triceps origin

posterior surface of humerus below spiral groove

medial head triceps insertion

olecranon

medial head triceps innervation

radial n.

medial head triceps action

extension of forearm

long head triceps origin

infraglenoid tubercle on scapula

long head triceps innervation

radial n.

long head triceps insertion

olecranon

long head triceps action

extension of forearm and arm

pronator teres origin

medial epicondyle of humerus and coronoid process of ulna

pronator teres insertion

lateral surface of middle of radius

pronator teres action

pronation and flexion of forearm

pronator teres innervation

median n

flexor carpi radialis origin

medial epicondyle of humerus

flexor carpi radialis insertion

2nd metacarpal

flexor carpi radialis action

abduction and flexion of hand

flexor carpi radialis innervation

median n

palmaris longus origin

medial epicondyle of humerus

palmaris longus insertion

palmar aponeurosis

palmaris longus action

tightening of flexor aponeurosis and flexion of hand

palmaris longus innervation

median n

flexor carpi ulnaris origin

medial epicondyle of humerus

flexor carpi ulnaris insertion

5th metacarpal, pisiform, and hamate

anterior compartment forearm - middle layer

flexor digitorum superficialis m.

flexor digitorum superficialis origin

medial epicondyle

flexor digitorum superficialis insertion

middle phalanx of digits 2-5

flexor digitorum superficialis action

flexion of PIP, MCP, and wrist joints

flexor digitorum superficialis innervation

median n

anterior compartment forearm - deep layer

flexor pollicis longus, flexor digitorum profundus, pronator quadratus

flexor pollicis longus origin

radius and interosseous membrane

flexor pollicis longus insertion

distal phalanx of digit 1

flexor pollicis longus action

flexion of distal phalanx of digit 1

flexor pollicis longus innervation

median n

flexor digitorum profundus origin

anterior ulna and interosseous membrane

flexor digitorum profundus insertion

distal phalanx of digits 2-5

flexor digitorum profundus action

flexion of DIP, PIP, MCP, and wrist joints

flexor digitorum profundus innervation

medial half - ulnar n; lateral half - median n

pronator quadratus origin

distal ulna

pronator quadratus insertion

distal radius

pronator quadratus innervation

median n

pronator quadratus action

pronation of forearm

brachioradialis origin

lateral supracondylar ridge

extensor carpi radialis longus origin

lateral supracondylar ridge

brachioradialis insertion

distal radius

brachioradialis action

flexion of forearm, supination

brachioradialis innervation

radial n

extensor carpi radialis longus insertion

base of 2nd metacarpal

extensor carpi radialis longue action

extension of wrist and adduction of hand

extensor carpi radialis longus innvervation

radial n

extensor carpi radialis brevis origin

lateral epicondyle of humerus

extensor carpi radialis brevis insertion

3rd metacarpal

extensor carpi radialis brevis action

extension of wrist and abduction of hand

extensor carpia radialis brevis innervation

radial n - deep branch

extensor digitorum origin

lateral epicondyle

extensor digitorum insertion

extensor expansion of digits 2-5

extensor digitorum action

extension of digits 2-5 at MCP and extension of wrist

extensor digitorum innervation

radial n - posterior interosseous

extensor digiti minimi origin

lateral epicondyle of humerus

extensor digiti minimi insertion

extensor expansion of digit 5

extensor digiti minimi action

extension of MCP and IP joints of digit 5

extensor digit minimi innervation

radial n - posterior interosseous

extensor carpi ulnaris origin

lateral epicondyle of humerus and ulna

extensor carpi ulnaris insertion

5th metacarpal

extensor carpi ulnaris action

adduction and extension of hand at wrist

extensor carpi ulnaris innervation

radial n - posterior interosseous

posterior deep layer of forearm

abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, supinator, extensor indicis

supinator origin

lateral epicondyle of humerus and ulna

supinator insertion

radius shaft

supinator innervation

radial n - deep branch

supinator action

supination of forearm

abductor pollicis longus origin

posterior ulna, radius, interosseous membrane

abductor pollicis longus insertion

base of 1st metacarpal

abductor pollicis longus action

abduction and extension of digit 1 at CMC joint

abductor pollicis longus innervation

radial n - posterior interosseous

extensor pollicis brevis origin

radius, interosseous membrane

extensor pollicis brevis insertion

proximal phalanx of digit 1

extensor pollicis brevis action

extension at MCP joint of digit 1

extensor pollicis brevis innervation

radial n - posterior interosseous

extensor pollicis longus origin

ulna, interosseous membrane