Semiology Lateralizing value (PPV) Symptomatogenic zone Mechanism Preserved consciousness and automatisms* 100% Unknown Unknown Ictal speech preservation* > 80% N/A Impairment of non-language areas Ictal vomiting* > 80% Temporal lobe and Papez circuit Activation Ictal spitting* 75% Unknown Unknown Ictal urinary urge N/A Mesial frontal region/ Medial temporal gyrus Activation Orgasmic auras N/A Mesiotemporal / frontal / amygdala Activation Peri-ictal water drinking* N/A Lateral hypothalamus Activation *in TLE. PPV: Positive Predictive Value; TLE: Temporal Lobe Epilepsy; N/A: Not Assigned.

Table 3: Lateralizing semiologic findings pointing to the non-dominant hemisphere.