Benign Childhood Epilepsy with Centrotemporal Spikes (Rolandic Epilepsy / BECTS) - EEG Pattern

An 8-year-old boy presents with a 4-month history of nocturnal seizures characterized by unilateral facial twitching, hypersalivation, and guttural sounds occurring within 1 hour of sleep onset. His developmental milestones and school performance are normal. Brain MRI is unremarkable. Sleep-deprived EEG shows the pattern marked **A** in the diagram — high-amplitude biphasic sharp waves maximal over the centrotemporal region with marked activation during non-REM sleep and a normal interictal background. Which of the following best describes the clinical significance of the electroclinical findings marked **A**?