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Diseases and Conditions of the Nervous System

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Term
Definition
hydrocephalus   abnormal accumulation of fluid (csf) in the brain  
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spina bifida   congenital defects in the lumber spinal column caused by imperfect union of vertebral parts (neural tube defect).  
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Alzheimer disease   brain disorder marked by gradual and progressive mental deterioration (dementia) with personality changes and impairment of daily functioning.  
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amyotrophic lateral schlerosis (ALS)   Degenerative disorder of motor neurons on the spinal cord and brainstem. Also known as Lou Gehrig's disease.  
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epilepsy   Chronic brain disorder characterized by recurrent seizure activity.Convulsions are preceded by an aura, which is a peculiar sensation before the onset of seizure.  
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Huntington disease   hereditary disorder marked by degenerative changes in the cerebrum leading to abrupt involuntary movements and mental deterioration.  
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multiple sclerosis   destruction of the mylin sheath on neurons in the cns and its replacement by plagues of sclerotic (hard) tissue.  
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myasthenia gravis (mg)   A chronic autoimmune neuromuscular disorder characterized by weakness (-asthenia) of voluntary muscles (attached to bones).  
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palsy   paralysis (partial or complete loss of motor function).  
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parkinson disease (parkinsonism)   degeneration of neurons in the basal ganglia, occurring in later life and leading to tremor, weakness of muscles, and slowness of movement.  
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tourette syndrome   involuntary, spasmodic, twitching movements, uncontrollable vocal sounds; and inapropriate words.  
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herpes zoster (shingles)   viral infection affecting peripheral nerves.  
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meningitis   inflammation of the meninges; leptomeningitis.  
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human immunodeficiency virus (HIV) encephalopathy   Brain disease and dementia occurring with AIDS.  
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brain tumor   abnormal growth of brain tissue and meninges.  
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cerebal concussion   temporary brain dysfunction (brief loss of consciousness) after injury usually clearing within 24 hours.  
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cerebal contusion   bruising of brain tissue as a result of direct trauma to the head; neurologic deficits persist longer then 24 hours.  
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cerebrovascular accident   Disruption in the normal blood supply to the brain; stroke.  
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