The extensor carpi radialis brevis is important in racket sports and golf which require strong wrist extension (movements where the wrist bends backwards).
- Origin – Lateral epicondyle of the humerus.
- Insertion – Base of the third metacarpal (back of wrist).
- Actions – Extension of the wrist. Abduction of the wrist. Weak extension of the elbow.
- Innervation – Radial nerve (c6 and c7).
- Daily uses – Gripping things.
- Example Strengthening Exercises – Tennis elbow wrist flexion exercises.
- Example Stretches – Tennis elbow stretch – the elbow is straightened, forearm pronated or rotated inwards and the palm hand pulled downwards.