Bicipital aponeurosis

Bicipital aponeurosis

Infobox Anatomy
Name = Bicipital aponeurosis
Latin = aponeurosis musculi bicipitis brachii
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Caption = Superficial muscles of the chest and front of the arm. (Lacertus fibrosus visible as white band at lower right.)


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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 radius, the aponeurosis stretches from the medial side of the biceps tendon and passes obliquely downward and medially across the brachial artery. It is continuous with the antebrachial fascia covering the origins of the flexor muscles of the forearm.

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.

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. cite web |url=http://bja.oxfordjournals.org/cgi/content/full/94/5/692 |title=The superficial ulnar artery--a potential hazard in patients with difficult venous access -- Chin and Singh 94 (5): 692 -- British Journal of Anaesthesia |accessdate=2008-01-05 |format= |work=]


=Additional

References

External links

* [http://www.radsource.us/rf/RADS/Internal.aspx?PID=670 Diagram at radsource.edu (seventh diagram from top)]
* - "Flexor Region of the Forearm: Muscles that Border the Cubital Fossa"


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Look at other dictionaries:

  • bicipital aponeurosis — n an aponeurosis that is given off as a broad medial expansion of the tendon of the biceps brachii at the elbow and that descends medially over the brachial artery to fuse with the deep fascia covering the origins of the flexor muscles of the… …   Medical dictionary

  • aponeurosis of biceps muscle of arm — bicipital aponeurosis a. musculi bicipitis brachii …   Medical dictionary

  • Aponeurosis — Aponeuroses (plural of aponeurosis: απο, away or of , and νευρον, sinew ) are layers of flat broad tendons. They have a shiny, whitish silvery color, and are histologically similar to tendons, but are very sparingly supplied with blood vessels… …   Wikipedia

  • bicipital fascia — aponeurosis musculi bicipitis brachii …   Medical dictionary

  • aponeurosis — A fibrous sheet or flat, expanded tendon, giving attachment to muscular fibers and serving as the means of origin or insertion of a flat muscle; it sometimes also performs the office of a fascia for other muscles. [G. the end of the muscle where… …   Medical dictionary

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  • bicipital fascia — noun : an aponeurosis given off from the tendon of the biceps of the arm and continuous with the deep fascia of the forearm …   Useful english dictionary

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