Sleep Brain Networks and Sleep Depth during Somatosensory Stimulation

Background: The resting brain presents a spontaneous activity measured by BOLD (Blood Oxygen Level Dependent) signal that encompasses definite cerebral areas and that has initially been described as Default Mode Network (DMN). This BOLD signal activation undergoes modifications, mainly over the frontal areas, throughout sleep and states of reduced consciousness. Advanced analysis method, such as the Independent Component Analysis (ICA) permit to disentangle the diverse activations of an idling brain, leading to the depiction of Resting State Networks (RSNs), that are, different brain areas related to physiologic…