Along with the posterior humeral circumflex blood vessel, it passes through the four holes, goes around the surgical neck of the humerus, and reaches the deep surface of the deltoid muscle.

coracobrachialis, biceps brachii, brachialis

Lateral cutaneous nerve of forearm

Along with the deep brachial artery, it enters the radial nerve groove and passes through the lateral intermuscular septum to between the brachioradialis and brachialis muscles. Divided into superficial and deep branches: the superficial branch runs along the lateral side of the radial artery The deep branch pierces the supinator muscle to the back of the forearm, running between the superficial and deep extensor muscles.

Located on the medial side of the brachial artery in the arm, it passes through the medial intermuscular septum to the back of the arm, down to the ulnar nerve groove behind the medial epicondyle of the humerus, and descends between the flexor digitorum profundus and flexor carpi ulnaris muscles on the medial side of the ulnar artery to the forearm. After the thin dorsal hand branch is divided at the junction of the middle and lower 1/3, the trunk enters the palm through the superficial surface of the flexor retinaculum.

The skin of the hypothenar eminence, the ulnar half of the little finger and the ring finger The dorsal branch of the hand is distributed on the ulnar half of the dorsum of the hand and the skin of the back of the ulnar half of the little finger, ring finger and middle finger

ulnar half of flexor carpi ulnaris and flexor digitorum profundus, minnow Interosseous muscles, adductor pollicis, interosseous muscles and 3rd and 4th lumbrical muscles

Muscles on the palmar surface of the forearm (except brachioradialis, flexor carpi ulnaris and ulnar half of flexor digitorum profundus) fish interfacial muscles (except adductor pollicis), and 1st and 2nd lumbrical muscles

The skin of the palm, thenar, the palmar surface of the three and a half radial fingers and the back of the middle and distal fingers

The accompanying brachial artery passes through the pronator teres muscle along the medial groove of the biceps brachii to the cubital fossa, and runs along the superficial and Between the flexor muscles, between the flexor carpi radialis tendon and the palmaris longus tendon, through the carpal tunnel, deep to the palmar aponeurosis to palm

In front of the medial malleolus - the great saphenous vein, pay attention to distinguish it here

peroneus longus brevis

Outside of the calf, instep and 2nd to 5th Skin on dorsum of toes

anterior calf muscles

The skin on the opposite edge of the 1st and 2nd toes