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Bicipital Aponeurosis
Muscular System

Bicipital Aponeurosis

Aponeurosis bicipitalis

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The bicipital aponeurosis is the flat tendinous expansion that arises from the biceps brachii tendon. It travels inferomedially along the cubital fossa and proximal end of the forearm to attach to the antebrachial fascia.

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Anatomical Relations

The bicipital aponeurosis is located:

- anterior (superficial) to the pronator teres and flexor carpi radialis muscles, the brachial artery, and the median nerve;

- posterior (deep) to the median cubital vein.

The bicipital aponeurosis forms the roof of the cubital fossa.


The bicipital aponeurosis attaches the biceps brachii muscle to the antebrachial fascia. It also protects the brachial artery and median nerve.

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Bicipital Aponeurosis

ScienceDirect image

The bicipital aponeurosis or lacertus fibrosus is a broad sheet of connective tissue that originates from the biceps brachii tendon and fans out medially, blending with the deep fascia that covers the anterior compartment.

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