Nous savons déjà que les intestins ont leur propre système nerveux, le SNE (système nerveux entérique), qui compte plus de 500 millions de neurones. Les scientifiques étudient à présent la manière dont les cellules nerveuses du SNE communiquent avec les neurones du cerveau à travers l’« axe intestin-cerveau ». Les dernières recherches sur le sujet montrent que tout ce qui se produit dans le milieu intestinal, y compris l’activité des bactéries qui y résident, influence les actions des neurones du SNE.
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