📖 Static demo — read-only snapshot
You’re browsing a static build of the Body IQ knowledge graph, so everything loads with no backend. A few things that need the live server are turned off here:
- Global search (sidebar) is disabled — it queries the API.
- The JSON API and the API “Try it” playgroundaren’t included.
- The data is a snapshot — it refreshes only when the demo is rebuilt, not live from the database.
Everything else — the body map, progression ladders, coverage heatmap, exercise finder, and all anatomy/exercise/source pages — works fully. The full app (live search + API + database) runs from the source on GitHub.
Abductor Pollicis Longus
Deep posterior forearm muscle. Radial abduction and extension at CMC. May have slips to trapezium and APB. Part of first dorsal compartment (de Quervain's).
Draft95%
Anatomy
- Origin
- Posterior radius, ulna, and interosseous membrane
- Insertion
- Radial base of 1st metacarpal (may have slips to trapezium and APB)
- Action
- Radial abduction and extension at CMC; important in wrist radial deviation
- Innervation
- Posterior interosseous nerve (C7-C8)
- Blood Supply
- Posterior interosseous artery
Movements (2)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Thumb Abduction | First Carpometacarpal Joint | Primary | Radial abduction |
| Radial Deviation | Radiocarpal Joint | Secondary | — |
Exercises (3)
| Exercise | Role |
|---|---|
| Thumb Radial Abduction | Primary |
| Radial Deviation Strengthening | Secondary |
| Dart Thrower's Motion | Secondary |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Abductor Pollicis Longus — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Abductor Pollicis Longus