EEG and optical HbR showed hand-cue information; mean measured trial coupling was small in 24 adults under fixed controls

We tested hand-cue information and trial coupling during imagined hand movement. Public studies supplied simultaneous EEG and optical recordings from 29 adults and EEG from 109 other volunteers. Five people per study supplied development. A code lock preceded new endpoints in 24 paired adults and 104 other EEG volunteers. First-cue mean AUCs were 0.6456 for paired EEG, 0.6126 for optical deoxygenated hemoglobin (HbR), and 0.5788 for independent EEG. The shared three-cell hand rule passed (Holm p=0.0008099). The paired trial model removed task, run, drift, cue history, baseline, eye power and nonmotor optical terms. Mean residual Fisher z was 0.01635, with a 95% person Student interval [-0.05568, 0.08838]. The positive coupling rule failed. The fixed mean-within-±atanh(0.10) rule passed (Holm p=0.0242392). All three claims share Holm correction. Negative people, development outcomes and oxygenated-hemoglobin results remain. This is a new controlled coupling benchmark and a reproduction of known hand information. The independent EEG study tests hand information only. It cannot confirm optical coupling. Residual EEG spatial-half consistency was weak. Different cues, fixed windows, sensor mixtures, measurement noise, no short-separation optical data and mean-model assumptions limit scope. No shared neural cause, absent neurovascular coupling or clinical benefit was established. Code, exact source checksums, complete statistical results, figures and repeat steps are supplied. Original signals remain external under their source terms.

motor imagery · EEG · fNIRS · HbR · trial coupling · hand cues · equivalence test · human neuroscience · reproducible benchmark