The Cubital Fossa-Boundaries-Contents-

The Cubital Fossa

The cubital fossa is a triangular depression that lies in front of the elbow.

Boundaries

■■ Laterally: The brachioradialis muscle

■■ Medially: The pronator teres muscle

The base of the triangle is formed by an imaginary line drawn between the two epicondyles of the humerus.

The floor of the fossa is formed by the supinator muscle laterally and the brachialis muscle medially. The roof is formed by skin and fascia and is reinforced by the bicipital aponeurosis.

Contents

The cubital fossa contains the following structures, enumerated from the medial to the lateral side: the median nerve, the bifurcation of the brachial artery into the ulnar and radial arteries, the tendon of the biceps muscle, and the radial nerve and its deep branch.

The supratrochlear lymph node lies in the superficial fascia over the upper part of the fossa, above the trochlea. It receives afferent lymph vessels from the third, fourth, and fifth fingers; the medial part of the hand; and the medial side of the forearm. The efferent lymph vessels pass up to the axilla and enter the lateral axillary group of nodes.