📖 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.
Middle Trapezius
Middle fibers of the trapezius. Primary scapular retractor.
Draft95%
Anatomy
- Origin
- Spinous processes C7-T3
- Insertion
- Medial acromion, superior spine of scapula
- Action
- Scapular retraction
- Innervation
- Spinal accessory nerve (CN XI), with proprioceptive and motor contributions from C3-C4
- Blood Supply
- Transverse cervical artery
Movements (4)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Scapular Retraction | Scapulothoracic Articulation | Primary | — |
| Shoulder Horizontal Abduction | Glenohumeral Joint | Secondary | — |
| Shoulder Extension | Glenohumeral Joint | Stabilizer | Scapular retraction |
| Scapular Upward Rotation | Scapulothoracic Articulation | Stabilizer | — |
Exercises (37)
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Middle Trapezius — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Middle Trapezius