The cubital fossa is the triangular area on the anterior view of the elbow of a human or other hominid animal. It is colloquially known as the "elbow pit".
medial (ulnar) boundary - lateral border of pronator teres muscle
lateral (radial) boundary - medial border of brachioradialis muscle
apex- it is directed inferiorly, and is formed by the meeting point of the lateral and medial boundaries
superficial boundary (roof)- skin, superficial fascia containing the median cubital vein, the lateral cutaneous nerve of the forearm and the medial cutaneous nerve of the forearm, deep fascia reinforced by the bicipital aponeurosis (a sheet of tendon-like material that arises from the tendon of the biceps)
The cubital fossa contains four main vertical structures (from lateral to medial):
The radial nerve is in the vicinity of the cubital fossa, located between brachioradialis and brachialis muscles. It is often considered part of the cubital fossa.