What is the action of the extensor digitorum?
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What is the action of the extensor digitorum?
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.
Which is the origin of the extensor digitorum?
| Extensor digitorum muscle | |
|---|---|
| Origin | lateral epicondyle (common extensor tendon) |
| Insertion | extensor expansion of middle and distal phalanges of the 2nd, 3rd, 4th, and 5th fingers |
| Artery | posterior interosseous artery |
| Nerve | posterior interosseous nerve |
What action does the extensor digitorum longus muscle perform?
The extensor digitorum longus muscle is located at the front of the leg and is adjacent to the peroneus brevis muscle and the tibialis anterior muscle. This wing-shaped muscle works to extend the foot at the ankle, along with the four smallest toes.
What is the origin and insertion of extensor digitorum longus?
Extensor digitorum longus (EDL muscle) is a feather-like muscle of the anterior (extensor) compartment of leg….Extensor digitorum longus muscle.
| Origin | (Proximal half of) medial surface of fibula, lateral tibial condyle, interosseus membrane |
|---|---|
| Insertion | Distal and middle phalanges of digits 2-5 |
What is the action of the extensor digitorum muscle quizlet?
The extensor digitorum muscle, also known as the extensor digitorum communis, is the only muscle involved in extension of all four fingers.
What is the action of flexor digitorum?
The flexor digitorum superficialis flexes the middle phalanges of the medial four digits at the proximal interphalangeal joints. It also flexes the proximal phalanges at the metacarpophalangeal joints and the wrist joint. Flexor digitorum superficialis can flex each finger it serves independently.
What is the insertion of extensor digitorum longus?
Extensor digitorum longus muscle
| Origin | (Proximal half of) medial surface of fibula, lateral tibial condyle, interosseus membrane |
|---|---|
| Insertion | Distal and middle phalanges of digits 2-5 |
| Action | Metatarsophalangeal and interphalangeal joints 2-5: Toe extension; Talocrural joint: Foot dorsiflexion; Subtalar joint: Foot eversion |
Where does the FDS insert?
Flexor digitorum superficialis muscle
| Origin | Humeroulnar head: Medial epicondyle of humerus, coronoid process of ulna Radial head: Proximal half of anterior border of radius |
|---|---|
| Insertion | Sides of middle phalanges of digits 2-5 |
| Action | Metacarpophalangeal and proximal interphalangeal joints 2-5: Finger flexion |
What is the origin insertion and action of the extensor hallucis longus?
Extensor hallucis longus muscle
| Origin | Middle third of medial surface of fibula, interosseous membrane |
|---|---|
| Insertion | Base of distal phalanx of great toe |
| Action | Metatarsophalangeal and interphalangeal joint 1: toe extension; talocrural joint: foot dorsiflexion |
| Innervation | Deep fibular nerve (L5, S1) |
What is the origin of flexor digitorum longus?
| Flexor digitorum longus muscle | |
|---|---|
| Origin | Posterior surface of the body of the tibia |
| Insertion | Plantar surface; base of the distal phalanges of the four lesser toes |
| Artery | posterior tibial artery |
| Nerve | Tibial nerve |
What is the origin and insertion of the flexor digitorum superficialis?
Based on its origin sites, flexor digitorum superficialis is divided into two heads; a humeroulnar head and radial head. Its large muscular belly courses distally towards the wrist, where it splits into four tendons and attaches to the middle phalanges of the second through fifth digits of the hand.
What joints does the FDP cross?
The flexor digitorum profundus (FDP) is an extrinsic hand muscle that flexes the metacarpophalangeal and distal interphalangeal joints of the index, middle, ring, and little fingers.
