Cracking the Code of Crying Babies: How Familiarity Changes the Interpretation of Cries

"* presentation of the study purpose and the protocol to the volunteer~* clinical examination to check inclusion and exclusion criteria~* Familiarization with the crying of one assigned baby, by listening to several bath cries from this baby"

"* Second phase of familiarization, listening again to bath cries of their assigned baby. These cries will be different from those listened during the first familiarization phase.~* MRI acquisition: after acquisition of the anatomical images (5 min), the subjects will listen to 64 cries divided into 4 functional MRI sessions of 10 minutes each. The cries will be those of their baby or of unknown babies, evoked in a painful (vaccination) or a non-painful (bath) situation, presented in a pseudo-random order. Participants will be asked to assess whether they recognize their baby (yes/no) and whether they recognize a pain cry (yes/no).~* debriefing~* Protocol ending"