📖 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.

Finger Abduction (MCP)

Metacarpophalangeal Joints • Hand • frontal plane

Draft80%

Spreading the fingers apart at the metacarpophalangeal joints.

Axis: anterior-posterior

Normal Range of Motion

No universally accepted goniometric norm; AAOS does not publish a value and normative data are sparse. Approximately 20 degrees of MCP abduction per finger is commonly cited clinically (Hoppenfeld), but it varies by digit (index/small > middle). Often assessed functionally as fingertip-spread distance in cm or by comparison with the contralateral hand.

Source: Norkin & White 2016

Muscles (2)

MuscleRoleNotes
Dorsal Interossei (Hand)Primary—
Abductor Digiti MinimiPrimaryAbducts 5th finger at MCP joint

Exercises (4)

Finger Extension with Rubber Band
Rubber-Band Finger Abduction
Isolated Small-Finger Abduction
Dexterity Training (Purdue Pegboard / 9-Hole Peg)

Sources