History
-Initially eveything was epileptiform
-Dr. Wilder Penfield discover TLE
-Discovery of BEVs
BEV clues
-No after‑going slow wave = think BEV
-Rhythmic without evolution = benign
-Sleep‑related sharp transients ≠ epilepsy
-Clinical correlation always normal
Variants
Temporal/ focal sharp‑appearing variants
>Wicket waves
>RMTD (Rhythmic mid‑temporal theta of drowsiness)
>TSS (Temporal small sharp spikes)
BETS (Benign epileptiform transients of sleep)
Generalized spike‑like variants
>6‑Hz phantom spike‑and‑wave
Sleep‑related benign variants
>6–14 Hz positive spikes (Ctenoids)
>BSSS (Benign sporadic sleep spikes)
Rhythmic non‑epileptic patterns
>SREDA
>Lambda waves
Pediatric / Developmental Variants
>Hypnagogic hypersynchrony
>PDR variants
