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Seizures in TEA patients commonly occur upon waking suggesting a link between TEA and sleep. It is possible that abnormal electrical activity during sleep disrupts the process of memory consolidation which normally occurs when we sleep. On-going subclinical seizure activity has implications for theories of memory consolidation, discussed below.
Breakthrough seizures are more likely with a number of triggers. [54]: 57 Often when a breakthrough seizure occurs in a person whose seizures have always been well controlled, there is a new underlying cause to the seizure. [55] Breakthrough seizures vary. Studies have shown the rates of breakthrough seizures ranging from 11 to 37%. [56]
Seizures may also occur as a consequence of other health problems; [30] if they occur right around a specific cause, such as a stroke, head injury, toxic ingestion, or metabolic problem, they are known as acute symptomatic seizures and are in the broader classification of seizure-related disorders rather than epilepsy itself.
Systemic infection with high fever is a common cause of seizures, especially in children. [3] [25] These are called febrile seizures and occur in 2–5% of children between the ages of six months and five years. [26] [25] Acute infection of the brain, such as encephalitis or meningitis are also causes of seizures. [3]
Although this sort of infection is uncommon it can be due to a virus, bacterium, or (very rarely) fungus. If a seizure happens during the infection itself, the person most likely does not have epilepsy but has "symptomatic seizures" or seizures occurring because of a known injury to the brain. Once the infection is stopped the seizures will stop.
The classic presentation of Todd's paresis is a transient weakness of a hand, arm, or leg after focal seizure activity within that limb. The weakness may range in severity from mild to complete paralysis. [3] When seizures affect areas other than the motor cortex, other transient neurological
Anything that causes epilepsy causes epileptogenesis, because epileptogenesis is the process of developing epilepsy. Structural causes of epilepsy include neurodegenerative diseases, traumatic brain injury, stroke, brain tumor, infections of the central nervous system, and status epilepticus (a prolonged seizure or a series of seizures ...
Transient loss of consciousness (TLOC) is a brief period of unconsciousness which resolves spontaneously. It may be traumatic—as in a concussion —or non-traumatic in origin. Common causes of non-traumatic TLOC include syncope and epileptic seizures .