Surface anatomy practical 2

action of biceps brachii

flexes elbow and supinates forearm

origin of biceps brachii

short head: coracoid process of scapula
long head: supraglenoid tubercle of scapula

insertion of biceps brachii

radial tuberosity and bicipital aponeurosis

origin of brachialis

anterior surface of humerus

insertion of brachialis

coronoid process of ulna

action of brachialis

elbow flexion

origin of brachioradialis

lateral supracondylar ridge of humerus

insertion of brachioradialis

styloid process of radius

action of brachioradialis

flexes elbow, helps with pronation and supination

origin of triceps brachii

Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove

insertion of triceps brachii

olecranon process of ulna

action of triceps brachii

extends elbow
lateral head: extends and adducts shoulder

origin of pronator teres

medial epicondyle of humerus

insertion of pronator teres

radius

action of pronator teres

Pronates forearm and flexes elbow

origin of pronator quadratus

distal ulna

insertion of pronator quadratus

distal radius

action of pronator quadratus

pronates forearm

origin of supinator

lateral epicondyle of humerus

insertion of supinator

radial shaft

action of supinator

supinates forearm

origin of extensor carpi radialis longus

lateral supracondylar ridge of humerus

insertion of extensor carpi radialis longus

base of 2nd metacarpal

action of extensor carpi radialis longus

extends and abducts wrist, assists elbow flexion

origin of extensor carpi radialis brevis

lateral epicondyle of humerus

insertion of extensor carpi radialis brevis

base of third metacarpal

action of extensor carpi radialis brevis

extends and abducts wrist, assists elbow flexion

origin of extensor carpi ulnaris

lateral epicondyle of humerus

insertion of extensor carpi ulnaris

base of 5th metacarpal

action of extensor carpi ulnaris

extends and adducts wrist

origin of extensor digitorum

lateral epicondyle of humerus

insertion of extensor digitorum

Bases of middle and distal phalanges of second through fifth fingers

action of extensor digitorum

extends digits 2-5

origin of flexor carpi radialis

medial epicondyle of humerus

insertion of flexor carpi radialis

base of 2nd and 3rd metacarpals

action of flexor carpi radialis

flexes and abducts hand at wrist

origin of palmaris longus

medial epicondyle of humerus

insertion of palmaris longus

flexor retinaculum and palmar aponeurosis

action of palmaris longus

wrist flexion

origin of flexor carpi ulnaris

medial epicondyle of humerus

insertion of flexor carpi ulnaris

pisiform, hook of hamate, base of 5th metacarpal

action of flexor carpi ulnaris

flexes and adducts hand at wrist

origin of flexor digitorum superficialis

medial epicondyle of humerus and shaft of radius

insertion of flexor digitorum superficialis

middle phalanges 2-5

action of flexor digitorum superficialis

flexes digits 2-5 and flexes wrist

origin of flexor digitorum profundus

anterior medial surface of the ulna

insertion of flexor digitorum profundus

bases of distal phalanges of digits 2-5

action of flexor digitorum profundus

Flexes distal phalanxes at distal interphalangeal joints of medial 4 digits
Assists with flexion of hand

origin of anconeus

lateral epicondyle of humerus

insertion of anconeus

olecranon process of ulna

action of anconeus

extend elbow

origin of extensor indices

ulna

insertion of extensor indices

tendon of extensor digitorum

action of extensor indices

extension and adduction of 2nd digit

origin of abductor pollicis longus

posterior surface of radius and ulna

insertion of abductor pollicis longus

base of thumb

action of abductor pollicis longus

abducts and extends thumb

origin of extensor pollicis longus

ulna

insertion of extensor pollicis longus

base of thumb

action of extensor pollicis longus

extension of thumb

origin of extensor pollicis brevis

Posterior surface of radius

insertion of extensor pollicis brevis

base of thumb

action of extensor pollicis brevis

extends thumb

origin of flexor pollicis longus

anterior surface of radius

insertion of flexor pollicis longus

base of thumb

action of flexor pollicis longus

flexes thumb

origin of abductor pollicis brevis

Flexor retinaculum

insertion of abductor pollicis brevis

base of proximal phalanx of thumb

action of abductor pollicis brevis

Abducts thumb and helps oppose it

origin of flexor pollicis brevis

superficial head: flexor retinaculum and trapezium
deep head: trapezoid and capitate

insertion of flexor pollicis brevis

base of proximal phalanx of thumb

action of flexor pollicis brevis

Flexes thumb, helps in opposition

origin of opponens pollicis

flexor retinaculum

insertion of opponens pollicis

1st metacarpal

action of opponens pollicis

opposition of thumb

origin of adductor pollicis

capitate, 2nd and 3rd metacarpals

insertion of adductor pollicis

base of proximal phalanx of thumb

action of adductor pollicis

adducts thumb

origin of lumbricals

tendons of flexor digitorum profundus

insertion of lumbricals

dorsal surface of phalanges

action of lumbricals

extend 2-5 PIP joints
flex 2-5 MCP joints

origin of palmar interossei

base of metacarpals

insertion of palmar interossei

Base of the proximal phalanx

action of palmer interossei

adduction of the fingers
assists with flexion and extension

origin of dorsal interossei

Adjacent sides of all metacarpals

insertion of dorsal interossei

base of proximal phalanx

action of dorsal interossei

abduct fingers
assists with flexion and extension

origin of abductor digiti minimi

Pisiform and tendon of flexor carpi ulnaris

insertion of abductor digiti minimi

base of proximal phalanx of digit 5

action of abductor digiti minimi

abducts digit 5
assists with opposition

origin of flexor digiti minimi brevis

hook of hamate and flexor retinaculum

insertion of flexor digiti minimi brevis

base of proximal phalanx of 5th digit

action of flexor digiti minimi brevis

flexes digit 5
helps with opposition

Origin of Opponens digiti minimi

hook of hamate and flexor retinaculum

insertion of opponens digiti minimi

shaft of 5th metacarpal

action of opponens digiti minimi

opposition of digit 5 at CMC joint

origin of quadratus femoris

rectus femoris: AIIS
others: femur

insertion of quadratus femoris

through patella to tibia

actions of quadratus femoris

extend the knee
rectus femoris: flexes hip

origin of biceps femoris

long head: ischial tuberosity
short head: linea aspera