📖 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.
Plantaris
Small, vestigial muscle posterior to the knee. Absent in ~7-10% of the population. Long thin tendon runs between gastrocnemius and soleus.
Draft90%
Anatomy
- Origin
- Lateral supracondylar line of femur, oblique popliteal ligament
- Insertion
- Calcaneus (medial to Achilles tendon)
- Action
- Weak knee flexion, weak ankle plantarflexion
- Innervation
- Tibial nerve (S1-S2)
- Blood Supply
- Popliteal artery branches
Movements (1)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Knee Flexion | Tibiofemoral Joint | Synergist | Weak contribution |
Exercises (4)
| Exercise | Role |
|---|---|
| Seated Calf Raise | Synergist |
| Calf Raise off Stair Edge | Synergist |
| Doorframe Calf Stretch | lengthening |
| Standing Calf Stretch on Step | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Plantaris — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Plantaris