Regional Anatomy of the Upper Extremity

Antecubital

Region anterior to the elbow

brachioradialis

Action: flexes elbow

motor innervation: radial nerve

brachioradialis

Action: flexes elbow

motor innervation: radial nerve

musculocutaneous nerve

6

sensory to lateral forearm

Axilla/Axillary

armpit

Palma/Palmar

Palm of hand

Carpus/carpal/carpi-

wrist

Coracobrachialis

action:adduct & flex shoulder

-motor innervation: musculocutaneous nerve

biceps brachii

action: both head=flex elbow/forearm and supinate forearm

action: long head=flex arm/shoulder

motor innervation: musculocutaneous nerve

brachialis

action:flex elbow/forearm

motor innervation: musculocutaneous nerve

brachialis

action:flex elbow/forearm

motor innervation: musculocutaneous nerve

triceps brachii

action: extend elbow/forearm

action of long head: extend and adduct shoulder

motor innervation: radial nerve

pronator teres

Action: pronates forearm

motor innervation: median nerve

pronator teres

Action: pronates forearm

motor innervation: median nerve

flexor carpi radialis

Action: flexes wrist and abducts hand

motor innervation: median nerve

flexor carpi radialis

Action: flexes wrist and abducts hand

motor innervation: median nerve

palmaris longus

action: flexes wrist

motor innervation: median nerve

palmaris longus

action: flexes wrist

motor innervation: median nerve

flexor carpi ulnaris

action: Flex wrist and adducts hand

motor innervation: ulnar nerve

flexor carpi ulnaris

action: Flex wrist and adducts hand

motor innervation: ulnar nerve

flexor digitorum superficialis

action: flex MCP & PIP joints of digits II-V

motor innervation: median nerve

flexor digitorum profundus *

action: flex MCP, PIP, & DIP joints of digits II-V

motor innervation: median nerve

Flexor pollicis longus*

action:flex MCP & IP joints of pollex

motor innervation: median nerve

extensor carpi radialis longus

top of #22

Action: extend wrist and abduct hand

motor innervation: radial nerve

extensor carpi radialis brevis

action: Extends wrist and abducts hand

motor innervation: radial nerve

extensor digitorum

action: extend MCP, PIP DIP joints of digits II-V

motor innervation: radial nerve

extensor carpi ulnaris

#20

Action: extends wrist and adducts hand

motor innervation: radial nerve

palmar aponeurosis

extensor retinaculum

flexor retinaculum

median nerve

9

sensation to anterior skin of lateral 3.5 digits

ulnar nerve

10

sensation to anterior and posterior skin of medial 1.5 digits

radial nerve

8

sensation to posterior skin of arm, forearm, and lateral 3.5 digits

axillary nerve

7

sensory to skin over the deltoid

subclavian artery

-right is a branch of the brachiocephalic artery

-left is the third branch of the aortic arch

subclavian vein

merges with internal jugular vein to form brachiocephalic vein

axillary artery

at lateral border of first rib

axillary vein

drains into/becomes subclavian vein

brachial artery

at inferior border of teres major

radial artery

radial vein (on blood models only)

(to the left blue)

merges with ulnar vein to form brachial vein

ie drains into brachial vein

ulnar artery

ulnar vein (on blood models only)

merges with radial vein to from brachial vein

ie drains into brachial vein

cephalic vein

drains into axillary vein

basilic vein

merges with brachial vein to form axillary vein

median cubital vein

-drains into basilica vein

-connects the basilica and cephalic VEIN and is often used for venipuncture

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