Cerebellar Modulation of Cognition in Psychosis

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• Diagnostic and Statistical Manual 5 diagnosis of moderate substance use disorder within the past month
• Conditions that might result in increased risks of side effects or complications from rTMS or MRI, including:
  • Intracranial pathology from a known genetic disorder (e.g., Neurofibromatosis 1, tuberous sclerosis) or from acquired neurologic disease (e.g. stroke, tumor), cerebral palsy, history of severe head injury, or significant dysmorphology;
  • History of fainting spells of unknown or undetermined etiology that might constitute seizures
  • History of multiple seizures or diagnosis of epilepsy
  • Any progressive (e.g., neurodegenerative) neurological disorder such as multiple sclerosis or Parkinson's disease
  • Chronic (particularly) uncontrolled medical conditions that may cause a medical emergency in case of a provoked seizure (cardiac malformation, cardiac dysrhythmia, asthma, etc.)
  • Metal implants (excluding dental fillings) unless cleared by the responsible covering MD (i.e. MRI compatible joint replacement)
  • Pacemaker
  • Implanted medication pump
  • Vagal nerve stimulator
  • Deep brain stimulator or transcutaneous electric nerve stimulation unit
  • Ventriculo-peritoneal shunt
  • Signs of increased intracranial pressure
  • Intracranial lesion
  • History of head injury resulting in prolonged loss of consciousness (>15minutes) or neurological sequelae
  • Pregnancy: All participants capable of becoming pregnant will be required to have a pregnancy test; any participant who is pregnant will not be enrolled in the study.

• Age between 18-55 years
• Diagnosis of a psychotic disorder (i.e. schizophrenia or schizoaffective disorder or bipolar disorder type I)
• Must be able to read, speak and understand English
• Must be judged by study staff to be capable of completing the study procedures
• Participants will be in stable outpatient treatment with no recent (within the past 30 days) hospitalizations or changes in their medication regimens.