These events represent a sudden, excessive electrical disturbance in the brain, and their manifestation can vary dramatically from one individual to the next. A generalized tonic-clonic seizure, for example, will show a distinct pattern of high-amplitude, rhythmic waves across the entire cortex.
Seizure Characteristics Tonic Clonic Myoclonic Examples
A focal seizure begins in a specific, localized area of one hemisphere, while a generalized seizure involves both hemispheres simultaneously from the outset. Variability and Individual Presentation.
Manifestations and Observable Symptoms The observable features of a seizure, often described by bystanders, are the visible output of this internal electrical storm. Common precipitants include sleep deprivation, excessive alcohol consumption, flashing lights (photosensitivity), fever, significant stress, and missed anti-seizure medications.
Seizure Characteristics Tonic Clonic Myoclonic Examples
These factors do not cause epilepsy in susceptible individuals but can lower the threshold for seizure occurrence. Non-motor signs are equally important and can involve changes in sensation, emotion, cognition, or autonomic functions like heart rate or pupil dilation.
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