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Focal seizures (also called partial seizures [1] and localized seizures) are seizures that affect initially only one hemisphere of the brain. [2] [3] The brain is divided into two hemispheres, each consisting of four lobes – the frontal, temporal, parietal and occipital lobes. A focal seizure is generated in and affects just one part of the ...
A seizure is a paroxysmal episode of symptoms or altered behavior arising from abnormal excessive or synchronous brain neuronal activity. [5] A focal onset seizure arises from a biological neural network within one cerebral hemisphere, while a generalized onset seizure arises from within the cerebral hemispheres rapidly involving both hemispheres.
Seizure prediction is a special case of seizure detection in which the developed systems is able to issue a warning before the clinical onset of the epileptic seizure. [ 76 ] [ 78 ] Computational neuroscience has been able to bring a new point of view on the seizures by considering the dynamical aspects.
The word is derived from the Latin word verbum (also the source of verbiage), plus the verb gerĕre, to carry on or conduct, from which the Latin verb verbigerāre, to talk or chat, is derived. However, clinically the term verbigeration never achieved popularity and as such has virtually disappeared from psychiatric terminology.
A simple febrile seizure is generalized, occurs singularly, and lasts less than 15 minutes. [19] A complex febrile seizure can be focused in an area of the body, occur more than once, and lasts for more than 15 minutes. [19] Febrile seizures affect 2–4% of children in the United States and Western Europe, it is the most common childhood ...
In about a third of cases, people with PTE have partial seizures; these may be simple or complex. [17] In simple partial seizures, level of consciousness is not altered, while in complex partial seizures consciousness is impaired. [14] When generalized seizures occur, they may start out as partial seizures and then spread to become generalized ...
The epileptic seizure in the vast majority of pediatric epilepsy patients is ephemeral, and symptoms typically subside on their own after the seizure comes to an end, but some children experience what is known as a “seizure cluster," in which the first seizure is followed by a second episode approximately six hours later.
Some characteristics which may distinguish PNES from epileptic seizures include gradual onset, out-of-phase limb movement (in which left and right extremities jerk asynchronously or in opposite directions, as opposed to rhythmically and simultaneously as in epileptic seizures), closed eyes, high memory recall, and lack of post-ictal confusion.