Elbow & Wrist Myology Flashcards
elbow flexor muscles
biceps brachii, brachialis, brachioradialis
brachialis origin
distal half of anterior surface of humerus
brachialis insertion
coronoid process and ulnar tuberosity
brachialis action
elbow flexion in pronation
brachialis nerve
musculocutaneous nerve
brachioradialis origin
lateral supracondylar ridge of humerus
brachioradialis insertion
lateral surface of distal radius
brachioradialis action
flexes elbow in neutral position
brachioradialis nerve
radial nerve
elbow extensor muscles
triceps brachii, anconeus
anconeus origin
lateral epicondyle of humerus
anconeus insertion
lateral surface of olecranon
anconeus action
assists triceps in elbow extension
anconeus nerve
radial nerve
common flexor origin
medial epicondyle
superficial compartment wrist flexors/pronators
pronator teres, flecor carpi radialis, palmaris longus, flexor carpi ulnaris
pronator teres origin
medial epicondyle and coronoid process
pronator teres insertion
middle and lateral surfaces of the radius
pronator teres action
pronates forearm and flexes elbow
pronator teres nerve
median
flexor carpi radialis origin
medial epicondyle
flexor carpi radialis insertion
base of second MC
flexor carpi radialis action
flexes and radially deviates hand at wrist
flexor carpi radialis nerve
median
palmaris longus origin
medial epicondyle
palmaris longus insertion
distal half of flexor retinaculum and palmar aponeurosis
palmaris longus action
flexes hand at wrist
palmaris longus nerve
median
flexor carpi ulnaris origin
humeral head: medial epicondyle
ulnar head: olecranon and posterior border of ulna
flexor carpi ulnaris insertion
pisiform, hook of the hamate, base of 5th MC
flexor carpi ulnaris action
flexes and ulnarly deviates hand at wrist
flexor carpi ulnaris nerve
ulnar nerve
middle compartment wrist flexors/pronators
flexor digitorum superficialis
flexor digitorum superficialis origin
medial epicondyle, coronoid process, radius
flexor digitorum superficialis insertion
bodies of middle phalanges of medial 4 digits
flexor digitorum superficialis action
flexes middle phalanges at PIP joints of medial 4 digits
flexor digitorum superficialis nerve
median nerve
deep compartment wrist flexors/pronators
flexor digitorum profundus, flexor pollucis longus, pronator quadratus
flexor digitorum profundus origin
proximal 3/4 of ulna
flexor digitorum profundus insertion
bases of distal phalanges 2-5
flexor digitorum profundus action
flexes at DIP joint, PIP joint, MCP joint, and wrist
flexor digitorum profundus nerve
digits 2 & 3: anterior interosseus nerve
digits 4 & 5: ulnar
flexor pollucis longus origin
anterior radius
flexor pollucis longus insertion
base of distal phalanx of thumb
flexor pollucis longus action
flexes phalanges of the thumb
flexor pollucis longus nerve
anterior interosseus nerve
pronator quadratus origin
distal 1/4 of anterior surface of ulna
pronator quadratus insertion
distal 1/4 of anterior surface of radius
pronator quadratus action
pronates forearm
pronator quadratus nerve
anterior interosseus nerve
common extensor origin
lateral epicondyle
superficial compartment wrist extensors/supinators
extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi
extensor carpi radialis longus origin
lateral supracondylar ridge
extensor carpi radialis longus insertion
base of 2nd MC
extensor carpi radialis longus action
extends and radially deviates the wrist
extensor carpi radialis longus nerve
radial nerve
extensor carpi radialis brevis origin
lateral epicondyle
extensor carpi radialis brevis insertion
base of 3rd MC
extensor carpi radialis brevis action
extends and radially deviates the wrist
extensor carpi radialis brevis nerve
deep radial nerve
extensor carpi ulnaris origin
lateral epicondyle
extensor carpi ulnaris insertion
base of 5th MC
extensor carpi ulnaris action
extends and ulnarly deviates the wrist
extensor carpi ulnaris nerve
deep radial nerve
extensor digitorum origin
lateral epicondyle
extensor digitorum insertion
extensor expansions of medial 4 digits
extensor digitorum action
extends medial 4 digits at MCPs and IPs via extensor mechanism, wrist extenstion
extensor digitorum nerve
deep radial nerve
extensor digiti minimi origin
lateral epicondyle
extensor digiti minimi insertion
extensor expansion of 5th digit
extensor digiti minimi action
extends 5th digit at MCP and IP joints
extensor digiti minimi nerve
deep radial nerve
deep compartment wrist extensors/supinators
supinator, extensor pollucis brevis, extensor pollucis longus, extensor indices, abductor pollucis longus
supinator origin
lateral epicondyle and posterior ulna
supinator insertion
lateral, posterior, and anterior surface of proximal 1/3 of radius
supinator action
supinates forearm
supinator nerve
deep radial nerve
extensor pollucis brevis origin
posterior radius
extensor pollucis brevis insertion
base of proximal phalanx of thumb
extensor pollucis brevis action
extends proximal phalanx of thumb at CMC joint
extensor pollucis brevis nerve
deep radial nerve
extensor pollucis longus origin
posterior ulna
extensor pollucis longus insertion
base of distal phalanx of thumb
extensor pollucis longus action
extends distal phalanc of thumb at MCP and IP joints
extensor pollucis longus nerve
deep radial nerve
extensor indices origin
posterior ulna
extensor indices insertion
extensor expansion of 2nd digit
extensor indices action
extends 2nd digit at MCP and IP joints via the extensor expansion
extensor indices nerve
deep radial nerve
abductor pollucis longus origin
posterior ulna
abductor pollucis longus insertion
base of 1st MC
abductor pollucis longus action
abducts thumb and extends at CMC joint
abductor pollucis longus nerve
deep radial nerve