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Effects of Brain Stimulation on Cognition, Oscillations and GABA Levels in Schizophrenia

RecruitingNAAges 18 Years - 47 YearsAllUniversity of California, Davis
NCT04267003 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

People with schizophrenia often have problems with attention, learning and memory and other cognitive abilities that interfere with their work and school performance. Unfortunately, even our best treatments often do not significantly reduce these cognitive problems. The current study investigates whether or not delivering a very small electrical current to people's foreheads (called, transcranial direct current stimulation; (tDCS)) might improve functioning in the front part of the brain and reduce these cognitive problems in people with schizophrenia. tDCS is non-invasive and has been shown to improve cognitive functioning in some preliminary studies. The current study will investigate whether giving tDCS during a task is more effective than giving it during rest (Aim 1), whether delivery of tDCS to the front of the head is more effective than delivery to the back of the head (Aim 2), a

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📋 Eligibility rules (as published)
Inclusion Criteria: * Participants must be able to sufficiently speak and understand English so as to be able to understand and complete cognitive tasks. * All subjects must have the ability to give valid informed consent. Inclusion Criteria for Patients with Schizophrenia Only: * Diagnosis of schizophrenia, schizophreniform or schizoaffective disorder * No medication changes in the prior month * No medication changes anticipated in the upcoming month * Stable outpatient or partial hospital status * Normal IQ (\>70; IQ will be measured by administering the Wechsler Abbreviated Scale of * Intelligence (WASI) test) * Must not be currently taking the antipsychotic clozapine Exclusion Criteria: * Pacemakers * Implanted electrical (brain and spinal) stimulators * Implanted defibrillator * Metallic implants * Skin damage or skin conditions such as eczema at the sites where electrodes will be placed * Hair styles hindering the placement of electrodes * Cranial pathologies * Head trauma * Epilepsy * Mental retardation * Any known history of neurological disorders (including epilepsy, amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), stroke, cerebral palsy, any DSM-5 axis I psychiatric disorder (for healthy control subjects), autism) * Uncorrected vision problems that would hinder cognitive testing (this also pertains to subjects with color blindness in tasks where discriminating colored objects/items is necessary for successful performance) * Pregnancy * Substance dependence in the past six months * Substance abuse in the past month
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What it tests

  • Transcranial Direct Current Stimulation
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Where

1 site
Imaging Research Center
Sacramento, United States
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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