📖 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.
Splenius Capitis
Superficial posterior cervical muscle. Bilateral action extends the cervical spine; unilateral action produces ipsilateral rotation and lateral flexion. Dominant force producer for ipsilateral rotation.
Draft95%
Anatomy
- Origin
- Lower half of nuchal ligament and spinous processes of C7-T3
- Insertion
- Mastoid process and lateral superior nuchal line
- Action
- Bilateral: cervical extension; Unilateral: ipsilateral rotation and lateral flexion
- Innervation
- Dorsal rami of middle cervical spinal nerves (C3-C5)
- Blood Supply
- Occipital artery
Movements (3)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Cervical Extension | Cervical Intervertebral Joints (C2-C7) | Primary | — |
| Cervical Lateral Flexion | Cervical Intervertebral Joints (C2-C7) | Primary | Ipsilateral |
| Cervical Rotation | Cervical Intervertebral Joints (C2-C7) | Primary | Ipsilateral rotation; dominant force producer |
Exercises (8)
| Exercise | Role |
|---|---|
| Prone Cervical Extension | Primary |
| Deep Neck Extensor Endurance | Secondary |
| Upper Cervical Rotation Drill | Secondary |
| Upper Cervical Extension Control | Synergist |
| Seated Trunk Rotation | Synergist |
| Cervical Protraction Awareness | Synergist |
| Seated Cervical Flexion AROM | lengthening |
| Chin Tuck with Overpressure | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Splenius Capitis — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Splenius Capitis