EEG — POSTS (Positive Occipital Sharp Transients of Sleep — NREM N2 Normal Variant)

A 22-year-old healthy medical student undergoes a routine sleep EEG study. During stage N2 sleep, the technician notes bilateral, symmetric, surface-positive sharp transients over the occipital leads (O1, O2, Oz) with a characteristic checkmark morphology, amplitude 40 microvolts, and duration <150 ms. These occur in brief trains at 4–5 Hz and coexist with sleep spindles and K-complexes. The structure marked **A** in the diagram is identified. Which of the following best describes the clinical significance and management of this finding?