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The extensor carpi radialis brevis (ECRB) muscle is an integral extensor and abductor of the wrist. It originates from the lateral epicondyle of the humerus, laying deep to the extensor carpi radialis longus and extensor digitorum communis, and superficial to the supinator. Insertion occurs at the base of the third metacarpal. The radial nerve or a derivative supplies innervation. Its significance in orthopedics is highlighted by its involvement in multiple surgical approaches, such as the Thompson and Kaplan approaches for exposure of the radius, as well as its association with several routinely observed pathologies. Many of the associated syndromes, such as lateral epicondylitis, arise from repetitive gripping motions or overuse and are frequently seen in the orthopedic clinic. This review seeks to provide a comprehensive summary of the relevance of the ECRB to the orthopedic setting to broaden knowledge of its anatomy and increase recognition and proper management of associated pathologies.

Extensor Carpi Radialis brevis: Review of Anatomy and Clinical Significance to Orthopedics