What muscles extend the pinky?
The extensor digiti minimi is a two joint muscle. It acts as an extensor in both joints. It extends the wrist, which means it moves the back of the hand toward the back of the forearm. It also extends the little finger, which means it straightens the little finger from a fist.
What muscle is EDM?
Extensor digiti minimi
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 digitorum communis muscle?
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) |
What muscles flex the forearm?
The biceps brachii, brachialis, and brachioradialis flex the forearm. The two-headed biceps brachii crosses the shoulder and elbow joints to flex the forearm, also taking part in supinating the forearm at the radioulnar joints and flexing the arm at the shoulder joint.
What is the muscle in your forearm called?
The muscles that move the forearm are located along the humerus, which include the triceps brachii, biceps brachii, brachialis, and brachioradialis. The 20 or more muscles that cause most wrist, hand, and finger movements are located along the forearm.
What is flexor carpi Radialis?
Description. The flexor carpi radialis muscle is a long, superficial muscle of the forearm that belongs to the anterior muscle group and lies in the first layer. It is a relatively thin muscle located on the anterior part of the forearm. It arises in the humerus epicondyle, close to the wrist area.
What is flexor pollicis longus?
The flexor pollicis longus (FPL) is a long muscle located at the deep layer with flexor digitorum profundus and pronator quadratus in the anterior compartment of the forearm. Though it is situated at the forearm, it is classified as part of the extrinsic muscles of the hand as it’s function is seen in thumb movement.
What is flexor digitorum superficialis?
The flexor digitorum superficialis (FDS), formerly known as the flexor digitorum sublimis, is the largest of the extrinsic flexors of the forearm. It forms the intermediate muscle layer between the superficial and deep muscle groups of the forearm.
What is the EIP tendon?
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. Extensor indicis proprius.
Where do forearm extensors originate?
It originates from the lateral epicondyle of humerus via the common extensor tendon. The muscle fibers then descend towards the wrist area where they converge onto a narrow tendon that passes along the dorsum of the hand to insert onto the base of metacarpal bone of the 5th digit.
What are the muscles of forearm?
The superficial compartment of the flexor surface of the forearm contains the pronator teres, the flexor carpi radialis longus, the palmaris longus, the flexor carpi ulnaris, and the flexor digitorum superficialis. All of these muscles originate primarily from the medial epicondyle of the humerus.
What are the different forearm muscles?
How many muscles are there in forearm?
twenty muscles
There are twenty muscles of the forearm. Again, the area is split into the anterior (flexor) and posterior (extensor) compartments and then each of those is divided into superficial and deep compartments.
What is the difference between the flexor digitorum superficialis and the flexor digitorum profundus?
Unlike the flexor digitorum profundus, flexor digitorum superficialis has independent muscle slips for all four digits. This allows it to flex the digits individually at their proximal interphalangeal joints. In addition, flexor digitorum superficialis aids the aids flexion of the wrist.
What is the extensor Indicis muscle?
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.
What does bifurcated extensor digiti minimi mean?
Extensor digiti minimi can also be bifurcated, which means split, at many different points in the muscle. The extensor digiti minimi is a two joint muscle. It acts as an extensor in both joints.
Where is the abductor digiti minimi muscle?
For the muscle of the foot, see Abductor digiti minimi muscle of foot. In human anatomy, the abductor digiti minimi ( abductor minimi digiti, abductor digiti quinti, ADM) is a skeletal muscle situated on the ulnar border of the palm of the hand.
Can the extensor digitorum communis run through the belly?
Absence of muscle rare; fusion of the belly with the extensor digitorum communis not uncommon. Variations to the fifth extensor compartment, which the extensor digiti minimi runs through, may cause tenosynovitis and can limit the use of the extensor digiti minimi.
Where does the extensor digiti minimi connect to the retinaculum?
Extensor digiti minimi muscle. Its tendon passes through a compartment of the extensor retinaculum, posterior to distal radio-ulnar joint, then divides into two as it crosses the dorsum of the hand, and finally joins the extensor digitorum tendon. All three tendons attach to the dorsal digital expansion of the fifth digit (little finger).