fNIRS standstill: frontal near-infrared spectroscopy with synchronous head IMU (single recording)

A single 12-minute standstill recording (2023-12-14) with an Artinis Brite frontal fNIRS headband (24 O2Hb/HHb channels, 75 Hz) and its built-in 6-axis IMU logged on the same clock. The full time-series is provided as an open spreadsheet export (with the channel legend); the proprietary OxySoft raw and project files are included as the authoritative source. NB: the montage has no short-separation channels, so the fNIRS is dominated by systemic physiology (cardiac ~31%) and is not usable for neural inference without systemic correction (see the accompanying analysis). Part of the Oslo Standstill Database. This recording is StillStanding365 session 348 (2023-12-14); the same session's chest-worn phone IMU, wrist heart rate and environment features are in the StillStanding365 record, giving four independent measurements of the same heartbeat that agree within 2 bpm. This record is self-contained: the same session's chest-worn phone IMU, wrist heart rate and skin temperature, and acoustic and visual environment features are copied in under session_data/, with the day's diary row and data dictionaries. Raw audio and video for the session are included: a full-body view for studying sway, a face crop for remote photoplethysmography, the 4-channel AmbiX ambisonic audio, and the synchronisation claps.Funding. Research Council of Norway (funder DOI 10.13039/501100005416): 322364 (fourMs Lab, University of Oslo); 262762 (RITMO Centre for Interdisciplinary Studies in Rhythm, Time and Motion); 324003 (AMBIENT — Bodily Entrainment to Audiovisual Rhythms).