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Lateral temporal lobe seizures arising from the temporal-parietal lobe junction may cause complex visual hallucinations. [2] In comparison to mesial temporal lobe seizures, lateral temporal lobe seizures are briefer duration seizures, occur with earlier loss of awareness, and are more likely become a focal to bilateral tonic-clonic seizure. [2]
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.
Symptoms will vary according to where the seizure occurs. When seizures occur in the frontal lobe, the patient may experience a wave-like sensation in the head. When seizures occur in the temporal lobe, a feeling of déjà vu may be experienced. When seizures are localized to the parietal lobe, a numbness or tingling may occur.
However, the "reason for the close relationship of TEA with sleep is unclear. It may be that the transition from sleep to waking acts as a trigger to a seizure focus in the medial temporal lobe. Alternatively, amnesia upon waking may reflect persistent post-ictal dysfunction of medial temporal lobe structures following a seizure during sleep." [2]
Seizures in the temporal lobe Geschwind syndrome , also known as Gastaut–Geschwind syndrome , is a group of behavioral phenomena evident in some people with temporal lobe epilepsy . It is named for one of the first individuals to categorize the symptoms, Norman Geschwind , who published prolifically on the topic from 1973 to 1984. [ 1 ]
Focal seizures affect a specific area of the brain, not both sides. [13] It may turn into a generalized seizure if the seizure spreads through the brain. [3] [13] [8] Consciousness may or may not be impaired. [3] [5] The signs and symptoms of these seizures depends on the location of the brain that is affected. Focal seizures usually consist of ...
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Abdominal aura is a common type of epileptic aura, and it is very common in temporal lobe epilepsy compared to extratemporal focal epilepsies. [3] In one study, more than half of patients with temporal lobe epilepsy experienced abdominal aura, and most of those cases of abdominal aura evolved into a generalized motor seizure .