The goal of this clinical trial is to validate if temporal interference brain stimulation (TIBS) is safe in healthy volunteers aged 20 to 65. The main questions it aims to answer are: * Is it safe to apply TIBS intervention to the left hippocampus in healthy participants? * Is it safe to apply TIBS intervention to the left insula in healthy participants? * Is it safe to apply TIBS intervention to the left anterior cingulate cortex in healthy participants? * Is it safe to apply TIBS intervention to the right inferior frontal cortex in healthy participants? Participants will: * Be Randomly allocated to either sham-first group or treat first-group, stratified by stimulated brain region, following a crossover-controlled experimental design * Complete baseline cognitive evaluations and mental status assessments, and undergo a baseline MRI scan on the same day * Receive stimulation for 5 consecutive days, followed by a 2-days washout period, then complete the remaining 5 days of stimulation. * Complete post-intervention cognitive evaluations and mental status assessments, and undergo a post-intervention MRI scan on the same day
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
80
Receive treatment stimulation for 5 consecutive days, followed by a 2-days washout period, then complete the remaining 5 days of sham stimulation
Receive sham stimulation for 5 consecutive days, followed by a 2-days washout period, then undergo 5 days of treatment stimulation
Taipei Veterans General Hospital
Taipei, Taiwan
RECRUITINGChanges in NRS related to intervention
Numeric rating scale (NRS) will be used to evaluate the side effects, pain intensity, and other adverse events potentially related to the intervention, at baseline, during stimulation, immediately after each session, and at follow-up.
Time frame: Baseline (before each stimulation session), midpoint during each session, immediately after each stimulation for 10 sessions (approximately 2 weeks), and 1 month after completion of all sessions.
Changes in VAS related to intervention
Visual analog scale (VAS) will be used to evaluate the side effects, pain intensity, and other adverse events potentially related to the intervention, at baseline, during stimulation, immediately after each session, and at follow-up.
Time frame: Baseline (before each stimulation session), midpoint during each session, immediately after each stimulation for 10 sessions (approximately 2 weeks), and 1 month after completion of all sessions.
Changes in MMSE from baseline to post-intervention
Mini-Mental State Examination (MMSE) will be administered to evaluate cognitive function approximately 1 week before the first intervention and 1 week after the last intervention. Cognitive function will be considered normal if the MMSE score is greater than 24.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation session
Changes in BAI from baseline to post-intervention
Beck Anxiety Inventory (BAI) will be administered to evaluate the mental status approximately 1 week before the first intervention and 1 week after the last intervention. Mental status will be considered stable if both BAI and BDI are less than 13.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation
Changes in BDI from baseline to post-intervention
Beck Depression Inventory (BDI) will be administered to evaluate the mental status approximately 1 week before the first intervention and 1 week after the last intervention. Mental status will be considered stable if both BAI and BDI are less than 13.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation
Changes in MRI from baseline to post-intervention
T1-weighted magnetic resonance imaging (T1-weighted MRI) and resting-state functional magnetic resonance imaging (resting-state fMRI) will be acquired to evaluate structural and functional brain alterations potentially related to the intervention. Imaging will be performed approximately 1 week before the first intervention and 1 week after the last intervention.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation
Changes in WCST score from baseline to post-intervention
Wisconsin Card Sorting Test (WCST) will be administered to evaluate cognitive function approximately 1 week before the first intervention and 1 week after the last intervention.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation session
Changes in verbal fluency test from baseline to post-intervention
Verbal fluency test will be administered to evaluate cognitive function approximately 1 week before the first intervention and 1 week after the last intervention.
Time frame: Approximately 1 week prior to the first stimulation session and approximately 1 week following the last stimulation session
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