The Dual-Frequency Glymphatic Clock: A Non-Invasive Device for Enhancing Sleep-Dependent Amyloid-β Clearance in Alzheimer's Disease

Alzheimer's disease (AD) is the leading cause of dementia, affecting over 55 million people worldwide. Despite decades of research, there is currently no cure or treatment that can halt disease progression. Existing pharmacological therapies only provide symptomatic relief and are often associated with significant side effects. This paper proposes a novel, theoretical framework for a home-based, non-invasive neuromodulation device: "The Dual-Frequency Glymphatic Clock". The device is designed to target the root pathology of AD by enhancing the brain's natural waste clearance mechanism, the glymphatic system, which is most active during N3 slow-wave sleep. The proposed system integrates three core components: (1) 40 Hz visual and auditory gamma entrainment delivered via LED glasses and bone-conduction headphones to activate microglial clearance of Amyloid-β. (2) 0.8 Hz auditory stimulation to amplify endogenous slow waves and increase cerebrospinal fluid pulsatility. (3) A forehead EEG sensor that uses real-time feedback to trigger stimulation exclusively during N3 sleep, maximizing therapeutic efficacy while avoiding sleep disruption. We hypothesize that by synchronizing external stimulation with endogenous sleep physiology, this device could enhance Aβ clearance by 30-40%, improve sleep quality, and potentially slow cognitive decline. This approach offers a safe, scalable, and cost-effective strategy to intervene early in AD pathology without drugs. Disclaimer: This manuscript presents a theoretical model and proposed device design. Experimental validation is required before any clinical application.