Magnetoencephalographic (MEG) Correlates of Negative Symptoms in Patients Suffering From Schizophrenia and Their Influence by Add-on Treatments

Inclusion Criteria: * Study Group (Schizophrenia Patients) Inclusion Criteria * Patients between the ages of 18-65 (male and female), Diagnosed in the past as suffering from schizophrenia. The diagnosis will be reaffirmed according to ICD criteria. * Right hand dominant. * Scores in PANSS negative questionnaire above 21 and positive symptom less than 24. * Gave informed consent for participation in the study. * Stable on the same antipsychotic medication for at least a month prior to entering the study Control Group (healthy Subjects) Inclusion criteria: * Healthy man and woman * Ages 18-65 * Right handed Exclusion Criteria: * Study Group (Schizophrenia Patients) (To prevent MEG artifacts by non relevant electric interference or brain conditions) * History of epilepsy, seizure, or hot spasm, sever head injuries. * History of metal in the head (outside the mouth space). * History of surgery including metal implant or history of metal particles in the eye, pacemaker, or any other medical pump. * History of migraines. * History of drug or alcohol abuse during the last year. Inability to achieve satisfying level of communication with the subject Control Group (healthy Subjects) * History of psychiatric diagnosis * Drug or alcohol addiction in the year prior to the study * History of epilepsy, seizure, or hot spasm. * History of head injuries. * History of metal in the head (outside the mouth space). * History of surgery including metal implant or history of metal particles in the eye, pacemaker, or any other medical pump. * History of migraines. * Use of psychotropic medication