“…Despite the known difficulties associated with the diagnosis of epileptic seizures in old age, there still seems to be little use of in-depth EEG investigations, including (Mattson et al, 1965;Drury and Beydoun, 1998;Hughes and Zialcita, 1999). Our study was prompted by our clinical impression (Arbasino et al, 2004), supported by literature data (Lieb et al, 1980;Rossi et al, 1984;Sammaritano et al, 1991;Malow et al, 1998;Ferrillo et al, 2000aFerrillo et al, , 2000b) that some epilepsy syndromes, particularly temporal lobe epilepsy, show a greater propensity to interictal spiking during deep NREM sleep.…”