📖 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.

Upper Cervical Rotation

Atlantoaxial Joint • Cervical Spine • transverse plane

Draft80%

Head turning at C1-C2. Approximately 50% of total cervical rotation occurs here.

Axis: vertical

Normal Range of Motion

Atlantoaxial (C1-C2) rotation is not isolated by standard clinical goniometry and has no AAOS/Norkin & White reference value, so set to null. C1-C2 is known to contribute roughly 40-45 deg (about half of total cervical rotation) per biomechanical studies, but this is an anatomical estimate, not a clinically measured goniometric normal.

Source: AAOS/Norkin & White (no isolated value); segmental estimate from White & Panjabi Clinical Biomechanics of the Spine

Muscles (2)

MuscleRoleNotes
Suboccipital MusclesPrimaryObliquus capitis inferior accounts for ~70% of C1-C2 rotation; rectus capitis posterior major assists
SternocleidomastoidSecondaryContralateral rotation

Exercises (2)

Upper Cervical (Suboccipital) Exercise with Release
Upper Cervical Rotation Drill

Sources