Human Anatomy Vol 1

o

I

-Mortin H Fischer

INTRODUCTION

The nerves are very important and precious component

of our body. This appendix deals with the nerves of

the upper limb. Most of the nerves course through

different regions of the upper limb and have been

described in parts in the respective regions. In this

appendix, the course of the entire nerve from origin to

its termination including the branches and clinical

aspects has been described briefly. Arteries of upper

limb have been tabulated in Table ,{1.5. Important

clinical tenns related to upper limb have been defined

and multiple choice questions are given.

Musculocutaneous nerve is so named as it supplies
muscles of front of arm and skin of lateral side of
forearm.

Root lue

Ventral rami of C5, C6 and C7 segments of spinal cord.

Coulse

Ax #ffief Aflm

Musculocutaneous nerve is a branch of the lateral cord
of brachial plexus (Fig. ,{1.1),lies lateral to axillary and
upper part of brachial artery. It supplies coraco-
brachialis, pierces the muscle to lie in the intermuscular
septum between biceps brachii and brachialis muscles,
both of which are supplied by this nerve.

Forearurx

Atthe crease of elbow, itbecomes cutaneousbypiercing
the deep fascia. The nerve is called the lateral cutaneous
nerve of forearm which supplies skin of lateral side of
forearm both on the front and back.

Fig. A1 .1 : The course of the musculocutaneous nerve

Branches to

Iateral sides of

the anterior and

posterior aspects

of forearm

Coracoid process

Short head and long

head of biceps brachii

and their nerves

Lateral cord

(c5, c6, c7)

Coracobrachialis and

its nerve

M uscu locutaneous

nerve (C5-C7)

Coracobrachialis, long head of

biceps brachii, short head of biceps

brachii, and brachialis.

Blonches

Muscular