Variant Bicipital Aponeurosis: A Cadaveric Study
Authors/Creators
- 1. Department of Anatomy, People's College of Medical Sciences, Bhopal-462037
- 2. Department of Anatomy, All India Institute of Medical Sciences (AIIMS), Bhopal
Description
The bicipital aponeurosis, also called lacertus fibrosus, is a band of fibres arising from the tendon of biceps
brachii muscle getting inserted on to the upper part of the posterior border of ulna. The function ascribed to the aponeurosis
is of protection of the median nerve and the brachial artery, which pass deep to it. The bicipital aponeurosis also performs
the important function of drawing the posterior border of the ulna medially during supination of the forearm. Various
clinical cases have been reported implicating the aponeurosis in causation of clinical conditions like median nerve entrapment,
compression of brachial artery, pronator syndrome etc. We report three cases of variant bicipital aponeurosis found during
the routine dissection for teaching undergraduate medical students (year 2012-13). The cases include thickened tendinous
slips bordering the aponeurosis, a third head of biceps forming the aponeurosis and the aponeurosis giving rise to some
muscle fibres which join externsor carpii radialis muscle.
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References
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