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a circular or rounded flat plate; often spelled disc in names of anatomic structures.
articular disk a pad of fibrocartilage or dense fibrous tissue present in some synovial joints.
Bowman's disk one of the flat plates making up a striated muscle fiber.
choked disk papilledema.
ciliary disk pars plana.
embryonic disk (germ disk) (germinal disk) a flattened round bilaminar plate of cells in the blastocyst of a mammal, where the first traces of the embryo are seen; called also embryonic or germinal area.
herniated disk see herniated disk.
intervertebral disk the layer of fibrocartilage between the bodies of adjoining vertebrae; see also herniated disk.
intra-articular d's articular disk.
Merkel's d's small cup-shaped tactile receptors in the skin that are particularly sensitive to continuous pressure.
optic disk the intraocular part of the optic nerve formed by fibers converging from the retina and appearing as a pink to white disk in the retina; there are no sensory receptors in the region and hence no response to stimuli. Called also blind spot.
ruptured disk herniated disk.
slipped disk popular term for herniated disk.
A broad disk of fibrocartilage situated between adjacent vertebrae of the spinal column.
one of the fibrous, broad, and flattened disks found between adjacent spinal vertebrae, except the axis and the atlas. The disks vary in size, shape, thickness, and number, depending on the location in the back and the particular vertebrae they separate.
Cylindrical elastic-like gel pads that separate and join each pair of vertebrae in the spine.
Mentioned in: Disk Removal
between two vertebrae.
the pad of fibrocartilage between the bodies of adjoining vertebrae made up of a pulpy center surrounded by a series of concentric fibrous rings. It is subject to degeneration, extrusion, protrusion and herniation resulting in the development of intervertebral disk disease (see below) known in humans as slipped disk.
intervertebral disk disease
the syndrome of pain and neurological deficits, sometimes complete paralysis, resulting from displacement of part or all of the nucleus of an intervertebral disk. Seen most often in dogs, particularly those of chondrodystrophoid breeds such as Dachshund, Basset hound and Beagle. The most frequently involved disks are in the thoracolumbar region from T11 to L2, but those in the cervical and lumber spine are also commonly affected. See also hansen's classification.
intervertebral disk space
the space between vertebrae occupied by an intervertebral disk as seen on radiographs.
see intervertebral foramen.