ACDF
Anterior cervical discectomy and fusion.
ALIF
Anterior lumbar interbody fusion.
Annulus
The outer layer of the intervertebral disc, which is located between the vertebral bodies. The annulus is made of collagen fibers.
Anterior
A term which describes the front of an object.
Apophyseal Joints
Joints located in the posterior arch of the vertebral column. Also known as Facet Joints.
Autograft
Bone which is taken usually from the patient's pelvis in order to fuse the spine.