Abductor pollicis longus

The abductor pollicis longus (APL) is a muscle 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 1st extensor compartment of the wrist before attaching distally.


Anatomy: Upper limb
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Article information

rID: 24510
Section: Anatomy
Synonyms or Alternate Spellings:
  • Abductor pollicis longus muscle
  • Abductor pollicis longus (APL)
  • APL muscle

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Cases and figures

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    Figure 1: extensor compartments of the wrist
    Drag here to reorder.
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