|Center for Advanced Spinal Neurosurgery - visit|
|Neurography Institute - visit|
Glossary - D
decompression: operation to relieve pressure on a structure
deep: Further away from the skin.
deep venous thrombosis or DVT: A blood clot within a leg vein.
demineralized bone matrix: A supplement to bone fusion made up of the fibrous proteins of bone.
demyelination: The loss of the normal lining of an axon so that conduction of nerve signals is greatly slowed or blocked.
dens: The portion of the C2 vertebra pointing upward.
dermatome: An area of the skin innervated by a single spinal nerve root.
DEXA scan: Dual Energy X-ray Absorptiometry used to assess bone density to diagnose osteoporosis.
diagnosis: The identification of a medical condition that explains a patient's symptoms and predicts the necessary treatment.
diagnostic imaging: The use of medical imaging to achieve a diagnosis.
discectomy: Removal of all or part of a spinal disc.
discitis: Infection within a disc space.
discogenic pain: A pain syndrome deriving from an abnormal spinal disc.
discogram: An injection used to evaluate the health of a spinal intervertebral disc, particularly to identify annular tears.
disc bulge: An abnormal expansion on the margin of a disc, typically still well contained by the annulus.
disc herniation: The escape of a portion of the nucleus pulposus through or partly through the annulus fibrosis.
distracting stimulus: A sensory stimulation applied in order to distract the patient typically from pain carried by the same nerve.
dorsal: Towards the back.
dorsal root ganglia: A collection of neurons associated with the processing of sensory information. Found within the sensory portion of the spinal nerve, just as the nerve exits the spinal foramina.
dorsiflexion: Bending the ankle upward to bring the toes closer to the knee
double-blind randomized trial: A type of medical research study in which neither the patient nor the physician knows whether a treatment or a placebo has been given. Considered to help avoid bias in the evaluation of results of an experiment.
dura: A hard, leathery membrane that surrounds the brain and the spinal cord.
dysphagia: Difficulty swallowing.