Inclusion Criteria:  PATIENTS UNDERGOING AWAKE CRANIOTOMY FOR TUMOR RESECTION (EXCLUDED E.G. SURGERY OF EPILEPSIA) INTRAOPERATIVE MONITORING (IOM) WITH ELECTROCORTICOGRAPHY AWAKE-AWAKE-AWAKE TECHNIQUE  Exclusion Criteria:  AGE <18 YEARS OLD NON AWAKE-AWAKE-AWAKE TECHNIQUE ABSENCE OF IOM