About this trial
This study aims to evaluate the safety and preliminary efficacy of combined auditory and visual 40-Hz stimulation in participants with biomarker-confirmed Alzheimer's disease spectrum disorders. A total of 60 participants with mild cognitive impairment due to Alzheimer's disease or mild Alzheimer's disease dementia will be randomly assigned in a 1:1 ratio to receive either active multisensory 40-Hz stimulation or sham stimulation. The intervention will be administered for 60 minutes once daily for 4 consecutive weeks. Clinical assessments, electroencephalography, multimodal magnetic resonance imaging, and blood biomarkers will be evaluated before and after the intervention. Additional clinical, electroencephalographic, and blood biomarker assessments will be performed at 3 and 6 months after the intervention.
Eligibility criteria
Qualifiers
Provision of written informed consent by the participant or the participant's legally authorized representative.
Age 45 to 75 years, inclusive.
Completion of at least primary school education.
Diagnosis within the Alzheimer's disease spectrum according to the National 5.Institute on Aging and Alzheimer's Association criteria.
Disqualifiers
Current or previous history of a neurological disorder other than Alzheimer's disease that may affect cognition or study assessments, including epilepsy, stroke, multiple sclerosis, poorly controlled migraine, intracranial injury, previous neurosurgery, or head trauma with residual neurological impairment.
Contraindication to magnetic resonance imaging, electroencephalography, auditory stimulation, visual stimulation, or noninvasive brain stimulation.
Current major depressive disorder or another psychiatric disorder that, in the investigator's judgment, may interfere with study participation or outcome assessment.
Clinically significant structural abnormalities on brain magnetic resonance imaging, including hydrocephalus, stroke, or another structural lesion that may confound study results.
Trial design
Treatments tested in this trial
- Multisensory 40-Hz Stimulation Device
- Sham Multisensory Stimulation