The main objective of this project is to characterize the endogenous generators underlying the emergence of sensory capacities and to characterize their associated functional connectivity. This will be done retrospectively on our High Resolution EEG database in premature neonates from 24 weeks of gestational age, which is the largest database worldwide. We will also use the OPM pediatric MEG, which is being set up in Amiens. This study will allow us to characterize the establishment of sensory networks before the modulation of cortical activity by external sensory information. The PhD candidate will be concentrated on developing advance signal processing approached using the already available datasets on HR EEG and MEG, for characterization of spontaneous neural oscillations and analysis of functional connectivity.