Human Anatomy Vol 1

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UPPER LIMB

i. Median nerve on the medial side of brachial artery.

ii. Terminal part of brachialartery bifurcating into radial

and ulnar arteries.

iii. The tendon of biceps brachii muscle between the

brachial artery and radial nerve.

iv. The radial nerve on a deeper plane on the lateral

side of biceps tendon.

ldentify brachialis and supinator muscles, forming

the floor of cubital fossa.

Olecranon fossa

Fig. 8.13: Nerves related to posterior aspect of humerus

Feotules

Cubital (Lattn cubitus, elbow) fossa is a triangular hollow

situated on the front of the elbow. (It is homologous

with the popliteal fossa of the lower limb situated on

the back of the knee.)

Boundories

Laterally - Medial border of the brachioradialis

(Fig. B.1a).

Medially - Lateral border of the pronator teres.

Base It is directed upwards, and is represented

by an imaginary line joining t}re ftont of

two epicondyles of the humerus.

Apex It is directed downwards, and is formed

by the meeting point of the lateral and

medial boundaries.

Fig.8.14: Boundaries of the right cubital fossa

Roof

The roof of the cubital fossa (Fig. 8.15) is formed by:

a. Skin.

b. Superficial fascia containing the median cubital vein

joining the cephalic and basilic veins. The lateral

cutaneous nerve of the forearm lies along with

cephalic vein and the medial cutaneous nerve of the

forearm along with basilic vein.

c. Deep fascia.

d. Bicipital aponeurosis.

Floor

It is formed by:

i. Brachialis (Figs 8.16a and b) and.

ii. Supinator surrounding the upper part of radius

Conlenls

The fossa is actually very narrow. The contents

described are seen after retracting the boundaries. From

medial to the lateral side, the contents are as follows.

1 The median neroe: It gives branches to flexor carpi

radialis, palmaris Iongus, flexor digitorum

superficialis and leaves the fossa by passing between

the two heads of pronator teres (Figs 8.L7 and 8.18).

2 The termination of the brachial artery, and the beginning

of the radial and ulnar arteries lie in the fossa.

The radial artery is smaller and more superficial than

the ulnar artery. It gives off the radial recurrent branch.

The ulnar artery goes deep tobothheads of pronator

teres and runs downwards and medially, being