The gut microbiome has been linked to depression, schizophrenia, and other neurological conditions, but it’s not yet clear whether the relationship is causal.

Johns Hopkins’s Ted Dawson discusses his lab’s demonstration that misfolded α-synuclein can move from the stomach to the brain and cause physical and cognitive symptoms.

The researchers who made the discovery suggest the signaling may form a sixth sense.

Normal brain function may have evolved to depend on gut microbes and their metabolites.