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Annular high-intensity zone
An annular high-intensity zone, often called HIZ, is a small bright focus on T2-weighted MRI...
Annulus fibrosus
Tough outer portion of an intervertebral disc, formed by fibrous layers surrounding the nucleus pulposus.Lire...
Anterior longitudinal ligament
The anterior longitudinal ligament is a fibrous band running along the front of vertebral bodies...
Anterior spinal artery
Longitudinal artery on the anterior spinal cord that, with segmental contributions, supplies much of its...
Atlantoaxial instability
Atlantoaxial instability is abnormal movement between the atlas, the first cervical vertebra, and the axis,...
