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An intraoperative test to show extensor carpi ulnaris tendon instability

Saskia H van Bergen1, Yasmeen Khan1, Ramon Tahmassebi1

  • 1Department of Orthopaedic Surgery, King's College Hospital, London, UK.

The Journal of Hand Surgery, European Volume
|April 30, 2025
PubMed

Keywords:
ECU instabilityExtensor carpi ulnaris (ECU) subluxationintraoperative testingulnar-sided wrist pain

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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis,...