Bicipital aponeurosis

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Bicipital aponeurosis
Gray410.png
Superficial muscles of the chest and front of the arm. (Lacertus fibrosus visible as white band at lower right.)
Latinaponeurosis musculi bicipitis brachii
Gray'ssubject #124 444
 
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Bicipital aponeurosis
Gray410.png
Superficial muscles of the chest and front of the arm. (Lacertus fibrosus visible as white band at lower right.)
Latinaponeurosis musculi bicipitis brachii
Gray'ssubject #124 444

The bicipital aponeurosis (also known as lacertus fibrosus) is a broad aponeurosis of the biceps brachii which is located in the cubital fossa of the elbow and separates superficial from deep structures in much of the fossa.

The bicipital aponeurosis originates from the distal insertion of the biceps brachii. While the tendon of the biceps inserts on the radial tuberosity, the aponeurosis reinforces the cubital fossa, and helps to protect the brachial artery and the median nerve running underneath. This protection is important during venipuncture (taking blood) from the median cubital vein.

It is one structure that has to be incised during fasciotomy in the treatment of acute compartment syndrome of the forearm and elbow region.

Some individuals (about 3% of the population) have a superficial ulnar artery that runs superficially to the bicipital aponeurosis instead of underneath it. These individuals are at risk for accidental injury to the ulnar artery during venipuncture.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.