In two ds005522 checks, speed stayed near 6 units/s through 4.9 s, invalidating the planned 4–5 s stationary baseline

A pre-specified plan asked whether 3–8 Hz hippocampal SEEG power was higher during virtual movement than during stationary periods of guided learning in OpenNeuro ds005522 (RAM YC1), session ses-0. The plan assumed a 1 s turn, 3 s drive, and 1 s pause and compared 1 s windows at 0–1, 2–3, and 4–5 s after NAV_LEARN onset. A partial run identified 34 participants with at least one depth contact labelled hippocampus (parahippocampal excluded) among 58 listed; six participants had no ses-0 electrodes file. Three subjects had HTTP 404 responses for the ses-0 bipolar EDF. Of the three completed subject outputs, two had hippocampal pairs but only 12 and 8 NAV_LEARN events, below the planned 40-trial inclusion threshold; the third had one hippocampal contact but no bipolar pair containing it. In both subjects with speed samples, speed was zero or near zero at 0–1.0 s and about 6 units/s from 1.5 s through at least 4.5 s (the saved profiles remain near 6 through 4.9 s). Therefore, the planned 4–5 s PAUSE window was not stationary and the task timing description did not match the observed samples. The plan requires speed-defined windows and a stationary baseline such as the 5 s inter-trial interval or post-arrival samples before use. The run ended before group signal analysis finished: no theta effect or group result is claimed. The package preserves the plan, numpy-only EDF HTTP Range analysis code, planned group statistics code, partial outputs, hashes, and source provenance.

hippocampus · SEEG · spatial navigation · theta power · speed profile · OpenNeuro · EDF · analysis plan · data provenance