Investigation of neurovascular coupling in four vigilance states of the human brain by simultaneous EEG-fNIRS measurement and wavelet coherence analysis

We conducted wavelet coherence analysis to quantify/image the cerebral neurovascular coupling at infra-slow frequencies during four different awake-to-sleep vigilance states using whole-head, simultaneous EEG and functional Near Infrared Spectroscopy measurements from 15 healthy human brains.