Oct 30, 2023 · Flexor pollicis longus is the only muscle that flexes the interphalangeal joint of the thumb, which makes it vital for activities that require hand gripping. Flexor pollicis longus also flexes the thumb at the metacarpophalangeal joint and contributes to the flexion of the wrist .

Oct 30, 2023 · Extensor pollicis longus is a deep muscle of the posterior aspect of forearm extending over the distal aspect of interosseous membrane and distal radioulnar joint.

The flexor pollicis longus (/ ˈ f l ɛ k s ər ˈ p ɒ l ɪ s ɪ s ˈ l ɒ ŋ ɡ ə s /; FPL, Latin flexor, bender; pollicis, of the thumb; longus, long) is a muscle in the forearm and hand that flexes the thumb. It lies in the same plane as the flexor digitorum profundus.

In human anatomy, the extensor pollicis longus muscle (EPL) is a skeletal muscle located dorsally on the forearm. It is much larger than the extensor pollicis brevis, the origin of which it partly covers and acts to stretch the thumb together with this muscle.

Nov 3, 2023 · Abductor pollicis longus belongs to the deep extensors in the forearm and it mainly pulls the thumb away from the palm. Learn more about it at Kenhub!

Extensor pollicis longus (EPL) is a long muscle located at the deep layer with extensor pollicis brevis, abductor pollicis longus, extensor indicis, and supinator muscle in the posterior compartment of the forearm.

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.

Dec 21, 2022 · An important contributor to thumb function, the extensor pollicis longus (EPL) muscle is an extrinsic thumb muscle that extends and adducts the thumb metacarpophalangeal (MCP) and interphalangeal (IP) joints (see Image. Extensor Pollicis Longus).

Jul 23, 2020 · The extensor pollicis longus serves to extend the thumb phalanx. The abductor pollicis brevis and adductor pollicis are both attached to the extensor pollicis longus tendon and can extend the interphalangeal joint of the thumb into a neutral position; however, only the extensor pollicis longus is able to completely hyperextend the ...

May 6, 2024 · The extensor pollicis longus (EPL) is one of the 5 deep forearm muscles in the posterior compartment, along with the supinator, extensor indicis, abductor pollicis longus, and extensor pollicis brevis.

Interactive 3D model and details on the anatomy of the flexor pollicis longus muscle covering its origin, insertion, action, innervation and blood supply.

Jul 21, 2020 · There are actually three main muscles which control thumb movement: the abductor pollicis longus (APL), the extensor pollicis brevis (EPB) and the extensor pollicis longus (EPL). Injury to the abductor pollicis longus can arise due to hand or wrist sprains, causing pain with certain wrist and thumb movements.

Jul 23, 2020 · The extensor pollicis longus crosses the radial artery with the extensor pollicis brevis and abductor pollicis longus tendons. The extensor pollicis longus constitutes the posterior border of the region of the hand known as the anatomical snuff box, which is the triangular indentation in the radial-dorsal aspect.

The Abductor pollicis longus (APL) is one of a deep extensor of the forearm and is responsible for facilitating movement and stabilization of the thumb. Its tendon is present in the first extensor compartment of the wrist. [1]

Jul 23, 2020 · Flexor pollicis longus is used for tasks requiring gripping of the hand such as grasping or lifting an object. Any injury to the muscle will cause a decrease in the flexion ability of the thumb which can be a frustrating and debilitating injury.

The Extensor pollicis longus (Extensor secundi internodii pollicis) is much larger than the preceding muscle, the origin of which it partly covers. It arises from the lateral part of the middle third of the dorsal surface of the body of the ulna below the origin of the Abductor pollicis longus, and from the interosseous membrane.

Jan 20, 2025 · The Flexor Pollicis Longus (FPL), a crucial muscle within the intricate anatomy of the forearm and hand, stands as a pivotal element in the biomechanics of thumb movement.

May 5, 2023 · Flexor pollicis longus has a broad origin, spanning almost the entire length of the radius’s anterior surface — the palmar side of the forearm. Proximally, it starts from below the radial tuberosity, extending to the area on the distal …

May 6, 2024 · What is the abductor pollicis longus (APL) muscle & where is it located. Learn its tendon attachments, blood & nerve supply, its functions, with diagram

It’s the extensor pollicis longus muscle! This muscle arises from the posterior middle third of the ulna and adjacent interosseous membrane. It extends distally all the way down to the tip of the thumb to insert onto the posterior base of the 1st distal phalanx.