Fig. 4
From: Near-infrared spectroscopy of the cerebellum in motor activation tasks

Actual NIRS recordings obtained for OxyHb (top row) and deOxyHb (bottom row) while performing Task 1 using Protocol 2. Distinct onset (vertical line) to maximum increase (OxyHb) or reduction (deOxyHb), represented as the peak of earliest onset and largest amplitude (arrows) are illustrated.