Musculoskeletal / VISUAL EXPLAINER
What Lets Your Head Turn from Side to Side?
The atlas supports the skull and participates in turning around the dens of the axis, with stabilizing ligaments and paired joint contacts. This differs from skull-atlas nodding; other neck joints also contribute to head movement.
READ THE IMAGE
What the illustration shows
Gold-and-navy English atlas-style poster, What Lets Your Head Turn From Side to Side? An anterior-oblique partial cutaway shows the skull base supported on the ring-shaped atlas C1 above axis C2, with the dens projecting upward. A conceptual inset shows the skull and C1 turning together around the dens, with C2 fixed as a reference. A superior-view inset labels the anterior arch, dens, transverse ligament behind it, and spinal cord farther posterior. A lateral joint inset distinguishes the skull–atlas nodding articulation from the lateral C1–C2 turning joint, and states that no C1–C2 disc is present. The poster notes that other neck joints contribute and that the images are schematic, not to scale. AllHumanBody.com and its gold slogan appear at the bottom.
How to interpret this poster
- The motion panel is conceptual, with C2 fixed only as a reference frame.
- Exact ligament attachments, cartilage thickness and canal dimensions are not certified.
- No C1–C2 intervertebral disc is shown; this is not a manipulation or safe-range guide.
- AI-assisted educational illustration; not physician certification, microscopy, a diagnosis or individualized medical advice.
- Fine annotations need enlargement; the full description provides an accessible text alternative.
AI-assisted educational illustration, adapted into web-sized images without changing its composition. This is general education, not an individual diagnosis or treatment recommendation.
EVIDENCE / CONTEXT
Sources and what they support
- Anatomy and Physiology 2e: 7.3 The Vertebral Column ↗
Atlas ring, C2 dens and transverse restraint.
- Anatomy and Physiology 2e: 9.6 Anatomy of Selected Synovial Joints ↗
Skull-atlas rocking versus atlas-axis rotation and paired lateral joints.
- 3D morphometry of the transverse and alar ligaments in the occipito-atlanto-axial complex: an in vitro analysis ↗
Anatomical transverse-band relationship around dens.
Evidence correspondence is limited to the abstract.