In human anatomy, the abductor pollicis longus (APL) is one of the extrinsic muscles of the hand. Its major function is to abduct the thumb at the wrist. Its tendon forms the anterior border of the anatomical snuffbox .

2023年11月3日 · Abductor pollicis longus is a muscle found in the posterior compartment of the forearm. It is one of the five deep extensors in the forearm, along with the supinator, extensor pollicis brevis, extensor pollicis longus and extensor indicis.

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. It lies immediately below the supinator and sometimes unites with it. The muscle belly consists fundamentally of three ...

APB and APL were activated in a number of directions for the thumb as well as for the hand. Cooperation between these muscles is necessary to stabilise the trapezium to the carpus in movements of the thumb. APB is activated in movements of the …

The abductor pollicis longus (APL) is classically described as inserting on the base of the first metacarpal. This study analyzed APL insertional anatomy and quantified the size of various elements of the extensor side of the thumb to determine ...

2023年4月1日 · The APL main tendon (APL) is clearly separated into two main tendons (double typology) to the 1rst MTC (APL 1 and APL 2). The specimen showed an accessory tendon (APL 3) with a terminal split in two slips (arrows), which were inserted into the …

2021年1月16日 · The abductor pollicis longus (APL) muscle is found in the deep layer of the posterior compartment of the forearm. As it descends, it becomes superficial and passes under the extensor retinaculum and through the 1 st extensor compartment of …

2022年9月1日 · Abduction, generated by the abductor pollicis longus (APL) and brevis (APB) muscles, and extension, primarily generated by the extensor pollicis longus (EPL) and brevis (EPB), are two major pollex movements. Uncharacteristic cleavage of APB during development can form an accessory APB (a-APB).

1996年7月1日 · The abductor pollicis longus (APL) muscle consists of two separate functional divisions with separate insertions. The muscle is composed of a deep and a superficial division. The APL and the abductor pollicis brevis (APB) are discussed in relation to assessment and clinical conditions on the basis of anatomic and electromyographic studies.

2018年8月20日 · It is characterized by thickening and inflammation of tendons of APL and EPB resulting in pain and swelling in the first extensor compartment of the wrist. The abductor pollicis longus is stretched with adduction and flexion of the thumb at the carpometacarpal joint and radial deviation of the hand at the wrist joint.