The extensor pollicis brevis originates from the posterior surface of the radius and the interosseous membrane of the forearm. It is connected with the extensor pollicis longus ⦠Derek Moore 0 % Topic. Ulnar: Flexor carpi ulnaris, flexor digitorum profundus (half), palmaris brevis, flexor digiti minimi, abductor digiti minimi, opponens digiti minimi, adductor pollicis, flexor pollicis brevis (deep head), palmar and dorsal interossei, and third and fourth lumbricals. The extensor pollicis brevis (or extensor pollicis brevis muscle, latin: musculus extensor pollicis brevis) is flat, thin muscle of the forearm that belongs to the posterior muscle group, lying in the second or deep layer. It originates from the trapezium and the flexor retinaculum. Abductor Pollicis Longus Extensor Pollicis Brevis Extensor Pollicis Longus ... Extensor Pollicis Brevis. The best sleeping position for back pain, neck pain, and sciatica - Tips from a physical therapist - Duration: 12:15. The code 26418 is correct for repair of the extensor pollicis longus tendon laceration of the thumb. Review Topic. 1 When the extensor indicis is added to these muscles, then they form a group of muscles called the deep ⦠But, 20650 is for the placement of a K-wire or Steinman Pin for the application of skeletal traction for fracture care, and does not apply to this situation, stabilization of the IP joint of the thumb. Tenosynovitis and tendinosis of the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) tendons is called de Quervainâs tenosynovitis. De Quervain tenosynovitis was first described in 1895 as a stenosing tenosynovitis of the abductor pollicis longus (APL) and the extensor pollicis brevis (EPB) as the tendons course through the first dorsal compartment of the wrist. Tendonitis may occur if either or both of the extensor pollicis longus and extensor pollicis brevis Assisting the Abductor Pollicis Longus in facilitating thumb movements are the Extensor Pollicis Brevis muscle and the Extensor Pollicis Longus muscle. There were 13 hands that did not fit any of Hiranuma's categories, and we classified them into three new types: E, F, and G. The numbers of extensor pollicis brevis tendons in the first compartment varied from one to three, and the number of abductor pollicis longus ⦠Tone and Tighten Recommended for you 0. Its tendon runs just lateral to the extensor pollicis longus tendon to insert at the base of the first phalanx of the thumb on the dorsal aspect. The Abductor Pollicis Longus muscle which along with two other muscles helps with motion of the thumb. abductor pollicis longus muscle. The extensor pollicis brevis muscle is located on the dorsal side of the forearm. abductor pollicis brevis, opponens pollicis, and first and second lumbricals. Origin: Posterior surfaces of radius and interosseous membrane: Insertion: Base of proximal phalanx of thumb: Action: Thenar Muscles: Instruct the patient âBring your thumb out to the sideâ All supplied by posterior interosseous branch of the radial nerve . Origin. First described by Swiss surgeon Fritz de Quervain in 1895, 1 this condition is commonly encountered as an overuse injury. Abductor Pollicis Longus (APL) Insertion: base of the 1st metacarpal; Action: extension of the 1st metacarpal and helps with abduction; Innervation: posterior interosseous branch of the radial nerve; Extensor Pollicis Brevis (EPB) 0.