📖 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.
Palmar Interossei
Three unipennate muscles on the palmar side of the metacarpals. Adduct the fingers at the MCP joints.
Draft95%
Anatomy
- Origin
- Palmar surfaces of 2nd, 4th, and 5th metacarpals
- Insertion
- Extensor expansions and proximal phalanges of fingers 2, 4, 5
- Action
- Finger adduction (MCP), assist MCP flexion and IP extension
- Innervation
- Ulnar nerve, deep branch (C8, T1)
- Blood Supply
- Palmar metacarpal arteries
Movements (1)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Finger Adduction (MCP) | Metacarpophalangeal Joints | Primary | Three PIs adduct index, ring, little fingers toward middle finger [Eladoumikdachi 2002] |
Exercises (7)
| Exercise | Role |
|---|---|
| Finger Adduction Exercise (Palmar Interossei) | Primary |
| Finger Adduction (Card Squeeze) | Primary |
| Hypothenar Reactivation (Bendz Method) | Synergist |
| Grip Squeeze and Release | Synergist |
| Finger Extension with Rubber Band | lengthening |
| Isolated Small-Finger Abduction | lengthening |
| Rubber-Band Finger Abduction | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Palmar Interossei — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Palmar Interossei