What is the function of extensor digitorum communis?
Function. Primarily, the extensor digitorum communis extends medial four digits at the metacarpophalangeal joints and secondarily at the interphalangeal joints. It also acts to extend the wrist joint.
What does the extensor Digiti Minimi do?
Function. Extensor Digiti Minimi helps in extending the fifth finger along with Extensor Digitorum Communis. It also helps in extension of the wrist.
What does the extensor carpi digitorum do?
As its name suggests, the main function of extensor digitorum is the extension of four medial fingers in metacarpophalangeal and proximal and distal interphalangeal joints.
What is the extensor digitorum muscle?
Extensor digitorum (ED) muscle, also known as extensor digitorum communis (EDC) muscle, is a muscle of the superficial layer of the posterior compartment of the forearm and with other extensor muscles arises from a common tendon attached to the lateral epicondyle of the humerus.
What is EDC finger?
Classically, a single slip of the extensor digitorum communis (EDC) and a single slip of the extensor indicis proprius (EIP) are said to run to the index finger. The EIP is said to be ulnar to the EDC at the level of the metacarpal head.
What are the finger extensors?
The extensor digitorum muscle extends the phalanges, then the wrist, and finally the elbow. It tends to separate the fingers as it extends them. In the fingers, the extensor digitorum acts principally on the proximal phalanges, acting to extend the metacarpophalangeal joint.
Is extensor Digiti Minimi deep or superficial?
superficial
Extensor digiti minimi (EDM) muscle (also known as extensor digiti quinti proprius) is a muscle of the superficial layer of the posterior compartment of the forearm, and with other extensor muscles arises from a common extensor tendon attached to the lateral epicondyle of the humerus.
What is the origin of the extensor carpi Radialis?
Extensor carpi radialis longus muscle
| Origin | Lateral supracondylar ridge of humerus, lateral intermuscular septum of arm |
|---|---|
| Insertion | Posterior aspect of base of metacarpal bone 2 |
| Actions | Wrist joints: Hand extension, hand abduction (radial deviation) |
| Innervation | Radial nerve (C5-C8) |
Is EIP ulnar to EDC?
The EIP is said to be ulnar to the EDC at the level of the metacarpal head. In dissections in this study, the classic description was noted in 58 of the hands. Ten hands had a double slip of the EIP.
What is the extensor hood mechanism?
Extensor Hoods are an elaboration of the extensor digitorum comunis (EDC) tendon on the dorsum of each phalanx. The extensor indicis (EI) and the extensor digiti minimi (EDM) insert into the extensor hoods of the second and fifth digits, respectively.
What is the extensor digitorum communis?
extensor digitorum communis. noun. extensor digitorum com·mu·nis | \\-kə-ˈmyün-əs, -ˈkäm-yə-nəs \\. : a muscle on the back of the forearm that extends the fingers and wrist.
Is the extensor digitorum communis involved in lateral epicondylitis?
The extensor digitorum communis has been found to play a role in the pathology of lateral epicondylitis because of its role in the extension of the middle finger which reproduces pain on resisted extension. It has been suggested that pathology in the extensor digitorum communis may be the basis of a positive Maudsley’s test.
Where is the extensor digiti minimi located?
The extensor digiti minimi (extensor digiti quinti proprius) is a slender muscle of the forearm, placed on the ulnar side of the extensor digitorum communis, with which it is generally connected.
Where does the extensor digitorum muscle originate?
The extensor digitorum muscle arises from the lateral epicondyle of the humerus, by the common tendon; from the intermuscular septa between it and the adjacent muscles, and from the antebrachial fascia.