EEG — 14-and-6 Hz Positive Spikes (Ctenoids — Benign Variant in Adolescents)

A 16-year-old boy is referred to the neurology clinic after an EEG performed during a sleep study shows the pattern marked **A** in the diagram — brief bursts of arch-shaped, comb-like waveforms appearing over the posterior temporal regions during drowsiness. The waveforms are surface-positive with a dominant frequency of 14 Hz admixed with 6–7 Hz activity, appearing in rhythmic trains with shifting side predominance. The patient's parents are concerned about possible epilepsy. Which of the following is the most appropriate clinical interpretation and management?