TY - RPRT TI - Impedance-Derived Heart Rate and Heart Rate Variability from tDCS Output Voltage: Sensorless Physiological Monitoring During Electrical Neuromodulation AU - Abdalla, Y. AU - Babaev, B. AU - Walsh, K. A. AU - Ferraz, C. V. AU - Charvet, L. AU - Pilloni, G. AU - Bikson, M. AU - FallahRad, M. PY - 2026 DO - 10.64898/2026.07.29.741585 UR - https://www.biorxiv.org/content/10.64898/2026.07.29.741585v1 ID - 10.64898/2026.07.29.741585 ER -