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 systemic component cannot be measured on its own and regressed out, and the recording is not usable for neural inference without systemic correction. 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.Formats. tab-separated text (.tsv) and PNG images. Column dictionaries named *_dictionary.tsv define the columns, and the README describes any table that has none. 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).