What might be a common waveform change observed in the EEG during a seizure?

During a seizure, a common waveform change observed in the EEG is generalized slowing. This slowing is characterized by a reduction in the frequency of brain activity, which can become widespread across the cortical surface. It reflects a temporary disruption in normal electrical activity, often linked to the seizure's effects on brain function.

Generalized slowing is particularly relevant during generalized seizures, where there is a simultaneous involvement of both hemispheres. The slowing seen in the EEG can manifest as an increase in theta or delta wave activity, suggesting altered neuronal excitability and synchronization across large areas of the brain during the seizure.

Understanding this common waveform change is important for diagnostic purposes, as it assists clinicians in recognizing seizure activity and differentiating it from other neurological conditions.