Intervertebral Disk of Axis (C2–C3) (Discus intervertebralis C2–C3)
Educational content only — not medical advice.
Anatomy
The intervertebral disk of the axis (C2–C3) is the uppermost intervertebral disk of the human vertebral column, situated between the axis (C2) and the third cervical vertebra (C3). Composed of an outer anulus fibrosus and a hydrated inner nucleus pulposus, it provides shock absorption and permits flexion, extension, and lateral bending of the upper cervical spine. No intervertebral disk exists between the atlas (C1) and the axis (C2).
Clinical notes
Herniation of the C2–C3 disk is uncommon compared to lower cervical levels; when present, it compresses the exiting C3 spinal nerve, producing suboccipital and high cervical pain referred to the posterior scalp.
Related structures
Educational references
FAQ
What is the role of the Intervertebral Disk of Axis (C2–C3)?
The intervertebral disk of the axis (C2–C3) is the uppermost intervertebral disk of the human vertebral column, situated between the axis (C2) and the third cervical vertebra (C3). Composed of an outer anulus fibrosus and a hydrated inner nucleus pulposus, it provides shock absorption and permits flexion, extension, and lateral bending of the upper cervical spine. No intervertebral disk exists between the atlas (C1) and the axis (C2).
Why is the Intervertebral Disk of Axis (C2–C3) clinically important?
Herniation of the C2–C3 disk is uncommon compared to lower cervical levels; when present, it compresses the exiting C3 spinal nerve, producing suboccipital and high cervical pain referred to the posterior scalp.
Source & license
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