What is extensor Indicis?
Description. 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.
How do you find the extensor of Indicis?
Extensor indicis can be palpated by applying deep pressure over the lower part of the ulna while the index finger is extended. The main function of extensor indicis involves the extension of the index finger at the metacarpophalangeal and interphalangeal joints.
What does Indicis mean in anatomy?
the index finger
Indicis is a Latin adjective commonly used in anatomical terms pertaining to the index finger, but generally applicable to indexes of any kind.
How do you stretch extensor indicis?
Stretching the Extensor Indicis is simple. This muscle helps in the extension of the index finger, so to stretch it we will be doing the opposite action. Stretch your arm out in front of you and flex the index finger using your other hand. Hold for 30 seconds and release.
What are two actions of the extensor indicis muscle?
The extensor indicis extends the index finger, and by its continued action assists in extending (dorsiflexion) the wrist and the midcarpal joints.
What is the origin of the extensor digitorum?
Extensor digitorum muscle
| Origin | Lateral epicondyle of humerus (common extensor tendon) |
|---|---|
| Insertion | Extensor expansions of digits 2-5 |
| Action | Metacarpophalangeal / Interphalangeal joints 2-5: Finger extension |
| Innervation | Posterior interosseous nerve (C7, C8) |
How do you test extensor digitorum muscle?
The test is performed by tapping the extensor digitorum muscle while the fingers are light or half flexed. A sudden contraction of the musculus extensor digitorum and extension of the fingers indicate a normal reflex.
Can the extensor pollicis brevis Supinate the forearm?
When the thumb reaches the full extension or abduction, extensor pollicis longus can also assist in adduction of the thumb. Owing to the fact that their tendons cross the distal radioulnar joint, the extensors of thumb may assist in the supination of the forearm, as well as extension and abduction of the wrist joint.
Can extensor pollicis brevis Supinate?
These muscles include the supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus and extensor indicis. The only exception is the supinator muscle that acts specifically on the proximal radioulnar joint to produce supination of the forearm.
What are the characteristics of the extensor indicis?
Extensor indicis muscle 1 Origin and insertion. Extensor indicis is a narrow muscle that originates mainly from the ulna, arising from the posterior two-thirds of its distal surface, distal to extensor pollicis longus muscle. 2 Relations. 3 Innervation. 4 Blood supply. 5 Function.
Is extensor indicis proprius entrapment associated with distal radius fracture?
Entrapment of the extensor indicis proprius (EIP) after open reduction and internal fixation (ORIF) of the distal ulna with a plate and screw construct is rare. By literature review, we found evidence of such complication associated with distal radius fracture, but no past reports relating to the di …
Where is the musculus extensor indicis located?
Extensor indicis muscle (Musculus extensor indicis) Extensor indicis is a narrow, elongated muscle found in the posterior compartment of the forearm. It belongs to the deep extensors of the forearm, together with supinator, abductor pollicis longus, extensor pollicis longus, and extensor pollicis brevis muscles.
What does the extensor indicis receive blood from?
The superficial surface of the extensor indicis receives arterial blood supply from posterior interosseous branch of the ulnar artery, whereas its deep surface receives blood from perforating branches of the anterior interosseous artery.