Muskel week 5 arm forearm and hand (copy)

what artery provides the main arterial supply for the arm

what artery provides the main arterial supply for the arm

brachial artery

where does the brachial artery begin

teres major

where does the brachial artery end

cubital fossa under the bicipital aponeurosis

what artery travels through the radial groove

profunda brachii artery

what are the main superficial veins of the arm

basilic vein and cephalic vein

Nerve that has a motor branch that ends before the cubital fossa

musculocutaneous nerve

what does the musculocutaneous nerve become

lateral cutaneous nerve of the forearm

what nerve supplies all the muscles in the posterior compartment of the arm and forearm

Radial nerve

where on the brachial plexus does the radial nerve arise from

posterior cord

what does radial nerve and profunda brachii artery pass through on the humerus

spiral groove

other names for the spiral groove

radial groove, radial sulcus

where does the median nerve arise from on the brachial plexus

lateral and medial cord

what nerve is referred to as “the funny bone”

ulnar nerve

where does the ulnar nerve arise from on the brachial plexus

medial cord

what forms the floor of the cubital fossa

brachialis

what forms the medial border of the cubital fossa

mass of flexor muscles on the forearm, specifically pronator teres

what forms the lateral border of the cubital fossa

the mass of extensor muscles, specifically the brachioradialis

what forms the superior border of the cubital fossa

an imaginary line between the medial and lateral epicondyle of the humerus

what vein connects the cephalic and basilic vein

medial cubital vein

Origin of pronator teres

ulnar head: coronoid process

Humeral head: medial epicondyle

insertion of pronator teres

medial convexity of lateral radius

innervation of pronator teres

median nerve

action of pronator teres

pronates and flexes forearm at elbow

flexor carpi radialis origin

medial epicondyle of humerus

flexor carpi radialis insertion

base of second metacarpal

flexor carpi radialis action

wrist flexion and abduction

flexor carpi radialis innervation

median nerve

palmaris longus origin

medial epicondyle

palmaris longus insertion

distal half of flexor retinaculum, and apex of palmar aponeurosis

palmaris longus action

wrist flexion and tenses palmar aponeurosis

a patient comes in and you find their palmar aponeurosis is tense, what nerve would you look at first and why

median nerve because it innervates palmaris longus which tenses the palmar aponeurosis

palmaris longus innervation

median nerve

flexor carpi ulnaris origin

humeral head: medial epicondyle

ulnar head: olecranon and posterior border of ulna

flexor carpi ulnaris insertion

pisiform, hook of hamate and 5th metacarpal

flexor carpi ulnaris innervation

ulnar nerve

flexor carpi ulnaris action

flexes and adducts hand at wrist

what is stronger, flexor or extensor muscles of the forearm

flexor muscles

supeficial flexor muscles

pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

intermediate flexor muscles

flexor digitorum superficialis

deep flexor muscles of the forearm

flexor digitorum profundus, flexor pollicis longus, pronator quadratus

flexor digitorum superficialis origin

medial epicondyle, coronoid process, oblique line of the radius

flexor digitorum superficialis insertion

middle phalanges of digits 2-5

flexor digitorum superficialis action

flexes proximal and middle phalanges, flexes the hand and forearm

innervation of flexor digitorum superficialis

median nerve

blood supply of flexor digitorum superficialis

radial and ulnar arteries

blood supply for pronator teres

ulnar artery

blood supply for flexor carpi radialis

ulnar and radial artery

blood supply of palmaris longus

ulnar and radial artery

flexor carpi ulnaris blood supply

ulnar artery

flexor pollicis longus origin

interosseous membrane and anterior surface of the radius

flexor pollicis longus insertion

base of distal phalanx of the thumb

flexor pollicis longus action

flexes thumb and wrist

flexor pollicis longus blood supply

radial artery

flexor digitorum profundus origin

anteromedial surface of the ulna and interosseus membrane

flexor digitorum profundus insertion

medial base of distal phalanx 4 and 5

lateral base of distal phalanx 2 and 3

flexor digitorum profundus action

flexes distal phalanges

flexes the hand

flexor digitorum profundus innervation

medial part of ulnar nerve and lateral part of median nerve (via anterior interosseous nerve)

Blood supply of flexor digitorum profundus

radial and ulnar Arteries

Pronator quadratus origin

anterior surface of the distal ulna

pronator teres insertion

anterior surface of distal radius

pronator teres action

pronation of forearm and holds the radius and ulna together

pronator teres innervation

median nerve (via anterior interosseous nerve)

pronator quadratus blood supply

ulnar and radial arteries

major ligaments in the anterior wrist

palmar carpal ligament and flexor retinaculum (AKA transverse carpal ligament)

major dorsal wrist ligament

extensor retinaculum

what forms the carpal tunnel

ceiling: flexor retinaculum

Floor: carpal bones

where is the thenar

palmar lateral compartment of hand next to thumb

where is the hypothenar

palmar medial compartment of hand

what are the thenar muscles

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis

superficial posterior muscles of the forearm

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor carpi ulnaris

deep posterior muscles of the forearm

supinator, abductor pollicis longus, extensor pollicis brevis extensor pollicis brevis, extensor indices

what nerve innervates all of the posterior deep muscles of the forearm

deep radial nerve

where does the deep branch of the radial nerve arise from

the radial nerve in front of the lateral epicondyle in the cubital fossa

what is another name for the deep radial nerve

posterior interosseous nerve

boundaries of the anatomical snuff box

extensor pollicis longus, extensor pollicis brevis, abductor pollicis longus

brachioradialis origin and insertion

origin: lateral supracondylar ridge of the humerus

insertion: base of styloid process of the ulna

brachioradialis blood supply and innervation

radial artery and radial nerve

extensor carpi radialis longus origin and insertion

O: lateral supracondylar ridge of humerus

I: base of the second metacarpal

extensor carpi radialis longus blood supply and innervation

radial nerve and radial artery

brachioradialis action

flexes, pronates, and supinates the forearm

action of extensor carpi radialis longus

extends the hand, abducts the hand, fist clenching

extensor carpi radialis brevis origin and insertion

O: lateral epicondyle of the humerus

I: base of the 3rd metacarpal

extensor carpi radialis brevis action

extends hand, abducts hand, clenches fist

extensor carpi radialis brevis innervation and blood supply

deep radial nerve (AKA posterior interosseous nerve) and radial artery

extensor digitorum origin and insertion

O: lateral epicondyle of humerus

I: extensor expansion, base of middle and distal phalanges of digits 2-5

extensor digitorum action

extends medial 4 digits

extensor digitorum innervation and blood supply

deep radial nerve

radial artery and dorsal interosseous artery

extensor digiti minimi origin and insertion

O: lateral epicondyle of humerus and posterior surface of the ulna

I: extensor expansion of little finger

extensor digiti minimi action

extends the little finger (pinkie)

extensor digiti minimi innervation and blood supply

deep radial nerve

ulnar artery and dorsal interosseous artery

extensor carpi ulnaris origin and insertion

O: lateral epicondyle of humerus and posterior surface of the ulna

I: base of the of the 5th metacarpal

action of extensor carpi ulnaris

extends and adducts the hand

blood supply and innervation of extensor carpi ulnaris

deep radial nerve

ulnar artery and dorsal interosseous artery

deep extensor muscles of the forearm

supinator, extensor indices, extensor pollicis longus, extensor pollicis brevis and abductor pollicis longus

innervation of all of the deep extensor muscles of the forearm

deep radial nerve (AKA posterior interosseous nerve)

supinator muscle origin and insertion

lateral epicondyle, radial collateral ligament, annular ligament, and supinator crest of the ulna

action of supinator

supination of forearm

innervation and blood supply of supinator

deep radial nerve

radial artery and dorsal interosseous artery

extensor indicis origin and insertion

O: posterior surface of the ulna and interosseous membrane

I: extensor expansion of the index finger

extensor indicis action

extends index finder and hand