“…Most focal ACC epilepsies are believed to be idiopathic and cryptogenic. Frontal lobe epilepsy and ACC seizures are often drug-resistant (Biraben et al, 2001;Zaatreh et al, 2002) and the evaluation of alternative treatments, such as tDCS, is needed. Seizures that arise from the ACC are difficult to study because this region lies deep within the brain, and the proximity between the right and left ACC increases the difficulty in identifying where seizures actually start (Geier et al, 1977;Mazars, 1970;Nadkarni and Devinsky, 2009).…”