Human Anatomy Vol 1

UPPEB LIMB

Region supplied

Upper part of pectoral region, and skin

over upper part of deltoid

ARM

1. Upper medial pad (Fig.7.1)


2. Lower medial part


3. Upper lateral part (including skin over
   lower part of deltoid)


4. Lower lateral part


5. Posterior aspect
   FOBEARM


6. Medial side


7. Lateral side


8. Posterior side
   PALM


9. Lateral two-thirds


10. Medial one-third
    DORSUM OF HAND


11. Medial half including proximal and
    middle phalanges of medial 2lz digils


12. Lateral half including proximal and
    middle phalanges of lateral 2/z digils
    DIG]TS
    Palmar aspect, and dorsal aspect of
    distal phalanges


13. Lateral 31lz digits


14. Medial 172 digits

Table 7.1: The cutaneous nerves (Fig. 7.1)

Nerve(s)

Supraclavicular

lntercostobrachial

Medial cutaneous nerve of arm

Upper lateral cutaneous nerue of arm

Lower lateral cutaneous nerve of arm

Posterior cutaneous nerve of arm

Medial cutaneous nerve of forearm

Lateral cutaneous nerve of forearm

Posterior cutaneous nerve of forearm

Palmar cutaneous branch of median

Palmar cutaneous branch of ulnar

Dorsal branch of ulnar

Superficial terminal branch of radial

Palmar digital branch of median

Palmar digital branch of ulnar

Root value

C3, C4

r2

T1, T2

C5, C6

cs, c6

C5

c8, T1

C5, C6

C6, C7, C8

c6, c7

C8

C8

c6, c7

c7

C8

Derived from

Cervical plexus

2nd intercostal

Medial cord

Axillary nerve

Radial nerve

Radial nerue

Medial cord

Musculocutaneous

Radial nerue

Median

Ulnar

Ulnar

Radial

Median

Ulnar

tt
E

=Lo
CL
CL
f
co
oo
a

axillary nerve. It supplies the skin covering the

lower half of the deltoid.

3 The lower lateral cutaneous nerzte of the arm (C5, C6)

is a branch of the radial nerve given off in the

radial groove. It supplies the skin of the lower

half of the lateral side of the arm.

4 The intercoptobrachial nerae (T2) is the lateral

cutaneous branch of the second intercostal nerve.

It crosses the axilla, and supplies the skin of the

upper half of the medial and posterior parts of

the arm. It lies amongst the central group of

axillary lymph nodes.

5 The medial cutaneous nerae of the arm (T1, T2) is

the smallest branch of the medial cord of the

brachial plexus.

6 The posterior cutaneous nerrse of the arm (C5) is a

branch of the radial nerve given off in the axilla.

It supplies the skin of the back of the arm from

the insertion of the deltoid to the olecranon.

7 The lateral cutaneous neroe of the forearm (C5, C6)

is the continuation of the musculocutaneous

nerve. It pierces the deep fascia just lateral to the

tendon of the biceps 2-3 cm above the bend of

the elbow, and supplies the skin of the lateral

side of the forearm, extending anteriorly to a

small part of the ball of the thumb.

8 The medial cutaneous nerae of the forearm

(C8, T1) is a branch of the medial cord of the

brachial plexus. It runs along the medial side of

the axillary and brachial arteries, and supplies

the skin of the medial side of the forearm.

9 The posterior cutaneous nerue of the forenrm

(C6{B) arises from the radial nerve, in the radial

groove. It descends posterior to the lateral

epicondyle and supplies the skin of the back of

the forearm.

10 The median nerae gives off two sets of cutaneous

branches in the hand.

a. The palmar cutaneous branch (C6-CB) arises a

short distance aboae the wrist,lies superficial to

flexor retinaculum and supplies skin over the

lateral two-thirds of the palm including that

over the thenar eminence.