*add new title – Microbes and Brain share Neurochemistry. It shows possible routes for the bidirectional interaction between microbiota and brain, including mediation by the enteric nervous system. The figure also shows the influence of nutrition on microbiota, and the (as yet unproven) suggestion that bacteria themselves may influence eating behavior, creating a complex feedback loop which enables them to obtain preferred substrates. (Figure adapted from Lyte, 2014)

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