Human Anatomy Vol 1

UPPER LIMB

Axilla

Muscular Long head of triceps brachii

Medial head of triceps brachii

Cutaneous Posteriorcutaneous nerve

of arm

Vascular

Terminal

Table A1.2a: Branches of radial nerve

Radial sulcus Lateral side of arm

Brachioradialis

Extensor carpi radialis longus

Lateral part of brachialis (proprioceptive)

Superficial and deep or Posterior

interosseous branches

Lateral head of triceps brachii

Medial head of triceps brachii

Anconeus

Posterior cutaneous nerve of forearm

Lower lateral cutaneous nerve of arm

To profunda brachii artery

Rool Volue

Ventral rami of C5-C8, T1 segments of spinal cord.

Course

fl4

Median nerve is formed by two roots, lateral root from

lateral cord and medial root from medial cord of

brachial plexus. Medial root crosses the axillary artery

to join the lateral root. The median nerve runs on the

lateral side of axillary artery (see Fig.8.9).

3 .4rm*t
.E Median nerve continues to run on the lateral side of

: brachial artery till the middle of arm, where it crosses
g, in front of the artery, passes anterior to elbow joint into

fEL the cubital fossa (see Fig. 8.9 and 8.17).

; #i.ptuff*f F*ss*r

€ Median nerve lies mosi medial in the cubital fossa. It

E gives three branches to flexor muscles of the forearm.

Branches of deep dMsion of radial nerve

Back of forearm

Abductor pollicis longus,

extensor pollicis brevis,

extensor pollicis longus,

extensor digitorum, extensor

indicis, extensor digiti minimi

and extensor carpi ulnaris

To inferior radioulnar,

wrist and intercarpal

joints

Branches of supefficial division of radia! nerve

Anatomical snuff box and dorsum of hand

Skin over anatomical snuff box, lateral half of

dorsum of hand and lateral 2% digits till their distal

interphalangeal joints

To wrist joint, 1st carpometacarpal joint,

metacarpophalangeal and interphalangeal joints of

the thumb, index and middle fingers

It leaves the fossa by passing between to heads of

pronator teres (see Figs 9.11 and9.12).

F**.eg

Median nerve enters the forearm it lies in the centre

of forearm. It lies deep to fibrous arch of flexor

d s on the flexor digitorum

p Adheres to deeP surface of

fl ialis, leaves the muscle, along

its lateral border. Lastly it is placed deep and lateral to

palmaris longus.

*r- #efrst**atf*;nt

Median nerve lies deep to flexor retinaculum to enter

palm (see Fig. 9.10).

Fqsdrv;

Median nerve lies medial to the muscles of thenar

eminence, which it supplies. It also gives cutaneous

branches to lateral three and a half-digits and their nail

:' Table A1.2b:

Cubital fossa

Extensor carpi radialis

brevis and supinator

Muscular

Articular

Cutaneous and vascular

Articular

Wrist

Table A1.2c:

Forearm

Lateral side of forearm

and radial vessels