Healthy Volunteers
Conditions
Interventions
Study 1: Right-eye prism glasses (washout period) placebo glasses Study 2: Anodal tDCS to the right parietal lobe (washout period) sham tDCS to the parietal lobe
Study 1: Placebo glasses (washout per
Sponsors
Kobe University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: - Healthy adults aged 18 to 30 years - Right-handed, confirmed by the Edinburgh Handedness Inventory - No history of neurological or psychiatric disorders - Not meeting any contraindications for tDCS (Study 2 only) - Able to understand the study procedures and provide written informed consent
Exclusion criteria
Exclusion criteria: - History of neurological or psychiatric disorders - Orthopedic conditions affecting upper limb motor function - Visual impairments interfering with task performance - History of epilepsy or increased seizure risk - Contraindications for tDCS (Study 2) - Pregnant or possibly pregnant (Study 2) - Under the influence of alcohol or drugs - Deemed unsuitable by the principal investigator
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| - Study 1: Change in Aiming Component Difference in Aiming Component before and after intervention, derived from line bisection and reversed conditions. - Study 2: Change in Where Component Difference in Where Component before and after intervention, derived from line bisection and reversed conditions. | — |
Secondary
| Measure | Time frame |
|---|---|
| - Change in the Component not defined as the primary outcome (Study 1: Where Component; Study 2: Aiming Component) - Change in line bisection deviation (mm) - Reaction time and task performance time in line bisection - Performance on the cancellation task (Study 2) - Eye movement metrics during tasks (Study 2) - Persistence of intervention effects immediately and at short follow-up - Success of blinding (post-experiment questionnaire) | — |
Countries
Japan
Contacts
Public ContactToshiyuki ISHIOKA
Kobe University Graduate School of Medicine
Outcome results
None listed