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