📖 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.
Flexor Digitorum Profundus
Deep forearm flexor. Only muscle that flexes the DIP joints. Also flexes PIP, MCP, and wrist.
Draft95%
Anatomy
- Origin
- Proximal three-quarters of anterior and medial ulna, interosseous membrane
- Insertion
- Bases of distal phalanges of fingers 2-5
- Action
- Flexion of DIP joints (primary), assists PIP and MCP flexion and wrist flexion
- Innervation
- Lateral half: anterior interosseous nerve (C7, C8); Medial half: ulnar nerve (C8, T1)
- Blood Supply
- Anterior interosseous artery, ulnar artery
Movements (3)
| Movement | Joint | Role | Notes |
|---|---|---|---|
| Finger Flexion (DIP) | Distal Interphalangeal Joints | Primary | Sole muscle crossing DIP joint — only primary mover [Fox 2019] |
| Finger Flexion (PIP) | Proximal Interphalangeal Joints | Secondary | Also flexes PIP after FDS |
| Finger Adduction (MCP) | Metacarpophalangeal Joints | Stabilizer | MCP stability during adduction |
Exercises (20)
| Exercise | Role |
|---|---|
| Grip Strengthening (Squeeze Ball) | Primary |
| Grip Squeeze and Release | Primary |
| Wrist Neutral Splinting + Exercise Protocol (CTS) | Primary |
| Tendon Gliding Exercises (Finger) | Primary |
| Nerve and Tendon Gliding Exercises (Carpal Tunnel) | Primary |
| Tendon Gliding Sequence | Primary |
| Seated Cable Row | Stabilizer |
| Finger Adduction Exercise (Palmar Interossei) | Stabilizer |
| Barbell Row | Stabilizer |
| Bent-Over Row | Stabilizer |
| Hammer Curl | Stabilizer |
| Romanian Deadlift | Stabilizer |
| Hanging Leg Raise | Stabilizer |
| Ulnar Deviation Strengthening | Stabilizer |
| Pull-Up | Stabilizer |
| Chin-Up | Stabilizer |
| Dexterity Training (Purdue Pegboard / 9-Hole Peg) | Synergist |
| Finger Extension with Rubber Band | lengthening |
| Wrist Flexor Stretch | lengthening |
| Desk Wrist Flexor Stretch | lengthening |
Sources
- Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation — Anatomy of Flexor Digitorum Profundus — origin, insertion, action, innervation
- Muscles: Testing and Function with Posture and Pain — Manual muscle testing for Flexor Digitorum Profundus