TY - RPRT TI - Evaluating Brain Flow Index from a temple-worn wearable against depth-resolved time-domain NIRS during head-down tilt and postural transitions in healthy young men AU - Gulati, D. AU - Rudaeva, A. AU - Dutta, A. AU - Rogers, D. AU - Prajapat, R. AU - Kumar, N. AU - Gupta, S. AU - Goyal, D. AU - Boas, D. A. PY - 2026 DO - 10.64898/2026.09.17.751664 UR - https://www.biorxiv.org/content/10.64898/2026.09.17.751664v1 ID - 10.64898/2026.09.17.751664 ER -