The brain activity of premature infants and fetuses is composed of periods of rest and bursts. These bursts can be measured using EEG for premature infants and MEG for fetuses. It has already been determined that the proportion of bursts changes with the gestational age of the child. The objective of the internship is to compare the bursts of activity between premature babies and fetuses by performing the following tasks: - Bibliographic analysis of bursts of EEG activity in premature babies and MEG in fetuses - Feature extraction of bursts and inter-bursts - Analysis and comparison of the characteristics obtained