What is disk?

Disk is any platelike structure. Also written disc.
articular d. A circular fibrocartilaginous pad present in some synovial joints and attached to the joint capsule; eg., the articular disk of the temporomandibular joint.
herniated d. Posterior rupture of the inner portion of an intervertebral disk, causing pressure on the nerve roots with resulting pain; occurring most commonly in the lower back. Also called slipped disk.
intercalated d. The double membrane separating cells of cardiac muscle fibers.
interpubic fibrocartilaginous d. The fibro-cartilaginous disk uniting the articular surfaces of the pubic bones at the symphysis.
intervertebral d. The fibrocartilaginous tissue between the bodies of adjacent vertebrae, consisting of a jellylike center surrounded by a fibrous ring.
optic d. The portion of the nerve in the eyeball formed by retinal nerve fibers converging to a central area; it appears as an elevated pinkish white oval or circular disk;
it is the blind spot in the visual field.
slipped d. See herniated disk.
tactile d. The saucer-shaped termination of specialized sensory nerve fibers in contact
with a modified cell in the deep layers of the epidermis.
temporomandibular articular d. The articular disk of the temporomandibular joint; it separates the joint cavity into two compartments.

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