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Clonic seizures are defined by repetitive contractions of groups of muscles, typically of the limbs, face, or trunk. [25] These may involve one group of muscles or multiple groups of muscles (multifocal). An isolated focal seizure can move or spread, and can even alternate from one side of the body to the other.
Benign infantile epilepsy (BIE), also known as benign infantile seizures (BIS), is an epilepsy syndrome of which several forms have been described. The International League Against Epilepsy (ILAE) classify two main forms of the syndrome (familial and nonfamilial) [1] though several other forms have been described in the academic literature.
The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell model. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory .
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 ...
The amount of brain removed during the surgery depends on the extent of the brain involved in the seizures. It can range from just removing one lobe of the brain (temporal lobectomy) to disconnecting an entire side of the brain (hemispherectomy). [5] The procedure can be curative, where seizures are eliminated completely. [5]
A dystonic posture on one side of the body commonly indicates seizure onset from the opposite side of the brain e.g. right arm dystonic posture arising from a left temporal lobe seizure. [13] Impaired language function ( dysphasia ) during or soon following a seizure is more likely to occur when seizures arise from the language dominant side of ...
A drawing of the human brain showing the thalamus and cortex relative to other structures. The spike-and-wave pattern seen during an absence seizure is the result of a bilateral synchronous firing of neurons ranging from the neocortex (part of the cerebral cortex) to the thalamus, along the thalamocortical network. [2]
Repeated seizures, such as in occipital epilepsy, can cause extensive brain damage in the occipital lobe, as well as other regions. [ 7 ] When the brain detects that a pathway in the brain is not being used, or it is malfunctioning, the brain attempts to rewire, or to kill the cells involved in that pathway.