Glossary

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EDEMA

An excessive accumulation of fluid generally in extracellular.

EDWARDS

A posterior rod and sleeve device used in stabilization of traumatic spinal conditions.

EGGSHELL

Excavation of vertebral body for correction of deformity that is combined with spinal fusion.

ELECTROENCEPHALOPGRAHY (EEG)

The study of the electrical currents set up by brain actions; the record made is called an electroencephalogram.

ELECTROMYOGRAPHY (EMG)

A method of recording the electrical currents generated in a muscle during its contraction.

ENCEPHALOCELE

Protrusion of the brain through a cranial fissure.

ENDARTERECTOMY

Removal of fatty or cholesterol plaques and calcified deposits from the internal wall of an artery.

ENDOCRINE GLAND

A gland which furnishes an internal secretion, usually having an effect on another organ.

ENDOCRINOPATHY

Any disease due to abnormality of quantity or quality in one or more of the internal gladular secretions.

ENDOGENOUS

Arising within or derived from the body.

ENDOSCOPE

A medical device for viewing internal portions of the body. It is usually comprised of fiber optic tubes and video display instruments.

ENDOSCOPY

Inspection of internal body structures or cavities using an endoscope.

EPENDYMA

The membrane lining the cerebral ventricles of the brain and central canal of the spinal cord.

EPENDYMOMA

A growth in the brain or spinal cord arising from ependymal tissue. Tumor of the spinal cord.

EPIDURAL

Immediately outside the dura mater. Same as extradural.

EPIDURAL HEMATOMA

A blood clot between the dura mater and the inside of the skull.

EPILEPSY

Disorder characterized by abnormal electrical discharges in the brain, causing abnormal sensation, movement or level of consciousness.

ESOPHAGUS

Portion of the gut between the mouth and stomach in the anterior neck.

EXCISION

Removal by cutting away material.

EXTRADURAL

On the outer side of the dura mater.

EXOGENOUS

Originating outside of the body.

EXTENSION

The act of bringing the distal portion of a joint in continuity (though only parallel) with the long axis of the proximal portion.

EXTRUSION

Displaced material reaches the spinal canal through fibers of the annulus, but remains connected to the central dis material.

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