What is the extensor Indicis muscle?
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.
Which of the following is an action of the extensor Indicis?
Extensor indicis muscle
| Origin | Posterior surface of distal third of ulna and interosseus membrane |
|---|---|
| Insertion | Extensor expansion of index finger |
| Action | Wrist joints: Weak hand extension Metacarpophalangeal and interphalangeal joints of index finger: Finger extension |
| Innervation | Posterior interosseous nerve (C7, C8) |
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.
What is the origin of the flexor digitorum profundus?
Structure. Flexor digitorum profundus originates in the upper 3/4 of the anterior and medial surfaces of the ulna, interosseous membrane and deep fascia of the forearm. The muscle fans out into four tendons (one to each of the second to fifth fingers) to the palmar base of the distal phalanx.
Which muscles are flexors?
Flexors
- Pectoralis major.
- Anterior deltoid.
- Coracobrachialis.
- Biceps brachii.
What is extensor carpi ulnaris innervated by?
radial nerve
The radial nerve dives posteriorly through the heads of the supinator muscle in the antecubital fossa to form the posterior interosseous nerve. It innervates the extensor carpi ulnaris muscle in addition to the other muscles in the posterior compartment of the forearm.
What does Digiti mean?
finger
a combining form meaning “finger”: digitinervate.
How do you test FDP and FDS?
To test the FDP tendon, the patient flexes the distal phalanx. To test the FDS tendon, MCP and PIP joints are released, distal phalanges are kept extended, and the patient flexes the finger. The PIP joint and, to a lesser degree, the MCP joint should flex.
