Nov 3, 2023 · Deep to the extensor retinaculum, the extensor indicis tendon lies in the fourth dorsal (extensor) compartment of the wrist. It shares this compartment with the tendons of extensor digitorum muscle, sitting medial to them in their common tendinous sheath.

In human anatomy, the extensor indicis (proprius) is a narrow, elongated skeletal muscle in the deep layer of the dorsal forearm, placed medial to, and parallel with, the extensor pollicis longus. Its tendon goes to the index finger, which it extends.

Jan 4, 2025 · Extensor Tendon Injuries are traumatic injuries to the extensor tendons that can be caused by laceration, trauma, or overuse. Diagnosis is made clinically by physical examination and performing various provocative tests depending on the location of the injury.

Extensor Indicis Propius is a narrow elongated skeletal muscle situated in deep layer of posterior compartment of the forearm along with Supinator, Abductor Pollicis Longus, Extensor Pollicis Longus and Brevis. It is responsible for the movement of the index finger.

Dec 7, 2020 · The tendons of Extensor Indicis muscle facilitate extension of the various phalanges of the index finger. The Extensor Digitorum muscle traverses just parallel to the Extensor Indicis muscle. Some of the signs and symptoms suggesting an injured extensor indicis muscle are: Pain in the fingers and wrist with gripping objects.

May 6, 2024 · What is the extensor indicis proprius muscle, & where is it located. Learn its tendon attachments, anatomy, nerve, artery, & functions

The extensor tendon mechanism works by pulling the extensor tendons (black arrows) towards the forearm, which causes the fingers to extend at the MCP joint. The central slip is particularly important for extending the PIP joint, while the lateral bands are …

The Extensor indicis is a narrow, elongated muscle, placed medial to, and parallel with, the extensor pollicis longus. It arises, from the dorsal surface of the body of the ulna below the origin of the Extensor pollicis longus, and from the interosseous membrane.

Aug 2, 2021 · The extensor indicis (EI) muscle is an accessory extensor of the 2 nd digit. It is located in the deep layer of the posterior compartment of the forearm and its tendon passes through the 4 th extensor compartment of the wrist. It is one of the extrinsic muscles of the hand.

During an abnormal muscle test, the examiner should observe an abnormal muscle contraction that can move the joint or tendon. In a complete denervation injury, such as a complete nerve laceration, there will be no evidence of any muscle function and the muscle testing grade will be 0.