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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]
Although musicality is at least in non-musicians predominantly located in the right temporal lobe, the seizure onset may also be left-hemispherical. Of the approximately 100 patients reported in the literature so far, about 75% had temporal lobe epilepsy, women were slightly more affected, and the mean age of onset was about 28 years. [12]
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 ]
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.
An electroencephalogram (EEG) of the mesial temporal lobe of a patient in seizure. Although the understanding of the exact causes of musicogenic seizures is currently not fully known, a commonly understood mechanism is that this epilepsy is associated with emotional responses to music rather than the music itself. [1]
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]
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Spread to produce symptoms of temporal lobe involvement is exceptional and may indicate a symptomatic cause. [ citation needed ] Post-ictal headache , mainly diffuse, but also severe, unilateral and pulsating, or indistinguishable from migraine headache , occurs in half the patients, in 10% of whom it may be associated with nausea and vomiting.