PSYCH 454: Chapter 15 Terms: Tumors, Seizure Disorder, Cerebrovascular Accidents

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TumorA mass of cells whose growth is uncontrolled and that serves no useful function
A mass of cells whose growth is uncontrolled and that serves no useful function
Malignant Tumor
A cancerous tumor; lacks a distinct border and may metastasize.
Benign Tumor
A non-cancerous tumor; has a distinct border and cannot metastasize
Metasis
The process by which cells break off of a tumor, travel through the vascular system, and grow elsewhere in the body.
Glioma
A cancerous brain tumor composed of one of several types of glial cells
Mengioma
A benign brain tumor composed of the cells that constitute the meninges.
Seizure Disorder
The preferred term for epilepsy.
Convulsion
A violent sequence of uncontrollable muscular movements caused by a seizure.
Partial Seizure
A seizure that begins at a focus and remains localized, not generalizing to the rest of the brain
Generalized Seizure
A seizure that involves most of the brain, as contrasted with a partial seizure, which remains localized.
Simple Partial Seizure
A partial seizure, starting from a focus and remaining localized, that does not produce loss of consciousness
Complex Partial Seizure
A partial seizure, starting from a focus and remaining localized, that produces loss of consciousness.
Grand mal Seizure
A generalized, tonic-clonic seizure, which results in a convulsion.
Aura
A sensation that precedes a seizure; its exact nature depends on the location of the seizure focus.
Tonic Phase
The first phase of a grand mal seizure, in which all of the patient's skeletal muscles are contracted.
Clonic Phase
The phase of a grand mal seizure in which the patient shows rhythmic jerking movements.
Absence
A type of seizure often seen in children characterized by periods of inattention, which are not subsequently remembered; also called petit mal seizure.
Status Epilepticus
A condition in which a patient undergoes a series of seizures without regaining consciousness.
Hemorrhagic Stroke
A cerebrovascular accident caused by the rupture of a cerebral blood vessel.
Obstructive Stroke
A cerebrovascular accident caused by occlusion of a blood vessel.
Ischemia
The interruption of the blood supply to a region of the body.
Thrombus
A blood clot that forms within a blood vessel, which may occlude it.
Embolus
A piece of matter (such as a blood clot, fat,, or bacterial debris) that dislodges from its site of origin and occludes an artery; in the brain an embolus can lead to a stroke.
Free Radical
A molecule with unpaired electrons; acts as a powerful oxidizing agent; toxic to cells.

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