Secondarily generalized seizures are usually partial seizures evolving into generalized seizures, most often with tonic-clonic convulsions. The partial seizures, which were once limited to one hemisphere of the brain, progress to encompass the entire brain bilaterally. This causes a generalized seizure. The clinical nature of a secondarily generalized seizure usually does not differ from that…
A reflex seizure occurs as a direct response to a particular stimulus or event. These seizures are experienced by approximately 6 per cent of people with epilepsy. They can be triggered by visual stimulation, a sudden “startle,” or a variety of other factors alone or in combination. If a patient only has seizures as a…
Nocturnal seizures are usually tonic-clonic. They might occur just after a person has fallen asleep, just before waking, during daytime sleep, or while in a state of drowsiness. People who experience nocturnal seizures may find it difficult to wake up or to stay awake. Although unaware of having had a seizure while asleep, they may…
A musicogenic seizure is reflex epilepsy triggered by certain types of music or even specific frequencies of pitch for which the person’s brain has a low threshold or tolerance. These sounds trigger focal epileptiform EEG discharges in cerebral areas specific to the triggering stimulus. This usually results in a complex partial seizure, but may also…
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