TRIANGLE OF ELBOW Meaning and
Definition
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The triangle of the elbow, also known as the cubital fossa, is an anatomical region located on the anterior aspect of the elbow joint. It is a triangular-shaped depression formed by the borders of three muscles: the brachioradialis on the lateral side, the pronator teres on the medial side, and the imaginary line connecting the two epicondyles of the humerus bone on the proximal side.
The triangle of the elbow serves as an important anatomical landmark as it contains various structures that are crucial for the function of the upper limb. These structures include the brachial artery, which is the main blood vessel that supplies the arm, the median nerve, which provides motor and sensory innervation to certain muscles and areas in the forearm and hand, and the biceps tendon, which attaches the biceps muscle to the radius bone.
Clinical significance of the triangle of the elbow is mainly related to the structures it contains. For instance, the brachial artery can be palpated in the triangle to assess blood flow or to obtain blood samples. The median nerve can undergo compression or become injured within the triangle, leading to conditions such as carpal tunnel syndrome. Furthermore, the biceps tendon can be examined in the triangle to detect any abnormalities or tear.
In summary, the triangle of the elbow is a triangular anatomical region on the anterior aspect of the elbow joint, bounded by specific muscles and important structures. It plays a significant role in the assessment and understanding of various clinical conditions related to the upper limb.
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A space between the pronator teres and the supinater longus muscles on the flexor side of the elbow.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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