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Epilepsy
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Is an neurological condition of various etiologies which affects the central nervous system and results in recurrent spontaneous seizures.
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When can people you do not normally have seizures can experience one
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High fever, durg and hormone reactions, intense sleep or nutritional deprivation and electroshock therapy
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A seizure
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Is a sudden onset, self limiting episode of physical and or psychological dysfunction as a result of an abnormal burse of firing in the central nervous system.
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Ictus is
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Another word for seizure activity
ictal adjective for ictus
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What condition is usually present in an epileptic brain
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An irritable or epileptogenic focus
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What is an irritable or epileptogenic focus
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is a specific location in the brain tissue containing a gliosis, an aneurysm, abnormal chemistry or a tumor which is a site of origin or spontaneous depolarization of which acts as an irritant to nearby structures causing them to fire abnormally. this iniates a depolarization wave that spreads beyond the focal origin
The epileptic brain has a number of these foci
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Many epileptic experience auras before the seizure. What is an aura
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An aura is a sensory hallucination
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Common forms of auras include
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Tinnitus, whirring or gong like sounds, visual hallucinations- flashing lights darkening of the room, paraesthesias specific taste or smell sensations food smells.
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What is a trigger
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It is a stimulus usually sensory which produces activity in the abnormal brain area, and is therefore capable of pushing the neuronal tissue beyond its ictal threshold
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What is a destabilizing factor
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These are background facors which can make the epileptic more sensitive to seizure triggers. these includes recent injury, illness reactions newly prescribed drugs altered dosages lack of sleep poor eating habits emotional stress pain syndromes consumption of alcohol etc
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What causes Epilepsy
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Anything that damages deranges or disturbs neuronal function in the brain
most are resulto of predominance of excitation but one must remember that some have an absense of seizure
birth trauma
genetic preposition
presence of foci
older- strokes, heart failure and cardiac dysrhythmia they adversely affect blood/ nutrient supply to the brain and clearance of toxic elements
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Most common causes
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Genectic defects
difficult birth resulting in the loss of oxygen
dietary or metabolic disorders
head trauma
infections
Tumors aneuryms, hemtomas
cerebrovascular dises
Brain degenerative disease
Cardiac arrest
liver and kidney disfunction
alcohol and drugs
childhood high fever
allergies
hyper glycemia
severe schock
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Demographic of people with epilepsy
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Usually occurs in people under the age 18-30
lot of them fall off
30-50 smaller
over 50 due to other pathologies
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What neurotransmitter is decreased in a epileptic
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GABA inhibitory neurotransmitter
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Types of Seizures
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Tonic clonic type
absence type
jacksonian type
Psychomotor
akinetic atonic types
Myoclonic type
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