Active high-definition stimulation of targeted brain regions involved in perception and cognition.

Sham high-definition stimulation of targeted brain regions involved in perception and cognition.

Active (at or below 2mA) versus sham (at or below 0.5mA) stimulation targeting brain regions engaged during verbal and/or spatial perceptual and cognitive processing. Brain stimulation devices are not currently regulated by the United States Food and Drug Administration. Local IRB has determined the devices to be non-significant risk (NSR) devices via abbreviated investigational device exemption (IDE) procedure.

Ability to accurately and efficiently perceive perceptual information, including threat detection, local contrast gradient detection, face memory, and intent appraisal. All are computerized tasks.

Ability to accurately and efficiently process verbal information, including verbal cued free association tasks, verbal long-term memory, and language comprehension. All are computerized tasks.

Ability to accurately and efficiently process spatial information, including map learning, virtual urban navigation, and mental rotation. All are computerized tasks.