📖 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.
Extensor Carpi Radialis Brevis
Lateral forearm extensor. Extends and radially deviates the wrist. Common site of lateral epicondylitis pathology. Contributes 20.5% of wrist joint stiffness.
Draft95%
Anatomy
- Origin
- Lateral epicondyle via long, wide tendinous origin on anterior slope
- Insertion
- Base of 3rd metacarpal (dorsal surface)
- Action
- Wrist extension, radial deviation
- Innervation
- Posterior interosseous nerve (C6-C7)
- Blood Supply
- Radial artery branches
Movements (2)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Wrist Extension | Radiocarpal Joint | Primary | 20.5% of wrist joint stiffness contribution |
| Radial Deviation | Radiocarpal Joint | Primary | — |
Exercises (8)
| Exercise | Role |
|---|---|
| 6-Direction Wrist Resistance Training | Primary |
| Dart Thrower's Motion | Primary |
| Wrist Circles (AROM) | Primary |
| Radial Deviation Strengthening | Secondary |
| Grip Squeeze and Release | Stabilizer |
| Radial Nerve Glide | lengthening |
| Wrist Extensor Stretch | lengthening |
| Desk Wrist Extensor Stretch | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Extensor Carpi Radialis Brevis — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Extensor Carpi Radialis Brevis