- May 6, 2026FDP is the only flexor of the DIP joint and is uniquely innervated by two different nerves — the AIN…
- May 6, 2026EPL is the only extensor of the thumb IP joint and forms the medial border of the anatomical snuffbox. Its…
- May 6, 2026EPB runs with APL in the first extensor compartment and may have its own sub-compartment in up to 34% of…
- May 6, 2026The deep head provides DRUJ compression — a function analogous to the rotator cuff at the shoulder. AIN palsy denervates…
- May 6, 2026Brachioradialis is the most lateral elbow flexor with a radial nerve supply making it the key localising muscle for radial…
- May 6, 2026The radial head of FDS arises from the anterior radius and supplies the index and middle finger FDS slips. Its…
- May 6, 2026The humero-ulnar head arises from the medial epicondyle and coronoid and is the dominant head in mass flexion, supplying ring…
- May 6, 2026The index finger slip of EDC is the most radial of the four slips, supplemented by the EIP which lies…
- May 6, 2026The ring finger slip of EDC is often the largest of the four slips and is most involved in junctura…
- May 6, 2026APL typically has multiple tendon slips (1-4) inserting on the first metacarpal base, contributing to de Quervain stenosing tenosynovitis alongside…