• Source: Bicipital aponeurosis

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. It separates superficial from deep structures in much of the fossa.




Structure


The bicipital aponeurosis originates from the distal insertion of the biceps brachii, and inserts into the deep fascia of the forearm. The biceps tendon inserts on the radial tuberosity, and the bicipital aponeurosis lies medially to it. It reinforces the cubital fossa, helping to protect the brachial artery and the median nerve running underneath.




= Variations

=
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.




Clinical significance


The bicipital aponeurosis is superficial to the brachial artery and the median nerve, but deep to the median cubital vein. This protection is important during venipuncture (taking blood).
It is one structure that has to be incised during fasciotomy in the treatment of acute compartment syndrome of the forearm and elbow region.




References


This article incorporates text in the public domain from page 444 of the 20th edition of Gray's Anatomy (1918)




External links


Diagram at radsource.edu (seventh diagram from top)
Anatomy photo:07:01-0201 at the SUNY Downstate Medical Center - "Flexor Region of the Forearm: Muscles that Border the Cubital Fossa"

Kata Kunci Pencarian:

• Bicipital aponeurosis
• Aponeurosis
• Biceps
• Index of anatomy articles
• Cubital fossa
• Median nerve
• Biceps tendon rupture
• Median cubital vein
• Median nerve palsy
• Pronator teres syndrome