Human Anatomy Vol 1

UPPER LIMB

Coracoid process

Short head and long

head of biceps brachii

and their nerves

Cutaneous: Through the lateral cutaneous nerve of the

forearm it supplies the skin of the lateral side of the

forearm from the elbow to the wrist including the ball

of the thumb (see Fig.7.1).

Articular branches:

i. The elbow joint through its branch to the brachialis.

ii. The shoulder joint through a separate branch which

enters the humerus along with its nutrient artery.

Communicatin g br anches : The musculocutaneous nerve

through lateral cutaneous nerve of forearm

communicates with the neighbouring nerve, namely the

superficial branch of the radial nerve, the posterior

cutaneous nerve of the forearm, and the palmar

cutaneous branch of the median nerve.

Lateral cord

(c5, c6, c7)

Coracobrachialis and

its nerve

Muscu locutaneous

nerve (C5-C7)

Physician holds the patients wrist firmly, not letting

it move. Patient is requested to flex the elbow against

the resistance offered by physician's hand. One can

see and palpate hardening biceps and brachialis

muscles (Fig. 8.8).

Branches to

lateral sides of

the anterior and

posterior aspects

of forearm

Fig. 8.6: The course of the musculocutaneous nerve

i. Coracobrachialis

ii. Biceps brachii,long and short heads

iii. Brachialis (Fig. 8.7).

Deep fascia

' Basilic vein

Medial cutaneous nerve offorearm

Median nerve

Brachial artery and venae comitantes

Ulnar nerve and superior ulnar

collateral artery

Biceps brachii

Musculocutaneous nerve

Cephalic vein

Brachialis

Brachioradialis

Radial nerve and radial collateral artery

Posterior cutaneous nerve of forearm

Posterior descending branch of

profunda brachii artery

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Triceps brachii

Fig. 8.7: Transverse section passing through the lower one-third of the arm

Testing biceps brachii against resistance