Atlas of Intracranial Recordings on Cortical Responses After Functional tACS

Inclusion Criteria: * All epileptic patients that would receive the implantation of SEEG electrodes, regardless of the seizure locations; * There was no metal implantation before; * Eligible for MRI examination; * No other lesional neurological disorders; * Could be well informed by the study protocols. Exclusion Criteria: * Suffered from any other mental illnesses prior to the enrollment; * Those suffering from the serious or unstable organic diseases; * Pregnant or lactation women, and those who have a plan of pregnant; * Patients with central nervous system tumors, acute brain injury or infection; * Skin injured, or allergic to the exposure of the conductive gel; * Those with implanted devices; * Those who received modified electrical convulsive therapy, or TMS within the recent one month; * The score of item 3 (suicidal item) in HAMD-17 equal or greater than 3; * Enrolled in any other on going trials; * Other situations evaluated by the researchers as inappropriate to the enrollment