Semiology Lateralizing value (PPV) Symptomatogenic zone Mechanism Ictal speech arrest* 67% language areas  Impairment of language areas Postictal dysphasia > 80% language areas  Impairment of language areas *in TLE. PPV: Positive Predictive Value; TLE: Temporal Lobe Epilepsy

Table 4: Lateralizing semiologic findings pointing to the dominant hemisphere.