Clinical and Functional Significance of the Anomalous Insertion of the Brachialis into the Radial Tuberosity: A Case Report

Abstract

The brachialis is a muscle of the front of the arm. It is a powerful flexor of the elbow. It gets originated from the lower half of the shaft of the humerus, becomes tendinous and gets inserted into the ulnar tuberosity and the coronoid process of the ulna. In an adult male cadaver, we found an accessory brachialis muscle which originated from the lateral intermuscular septa, blended with the main bulk of the muscle and both got inserted into the radial tuberosity. The insertion of the brachialis into the radial tuberosity has been minimally reported in the Indian literature. Because of it’s insertion into the radial tuberosity, the ulnar component of the flexion of the elbow joint is minimal. The accessory muscle and it’s insertion narrows the space in the cubital fossa, they compress the median nerve, the brachial artery and the radial artery and they can cause neuro-vascular symptoms.

Keywords

• brachialis
• radial tuberosity
• median nerve
• brachial artery