The Microbiome, Volume 176, assembles known facts and provides guidance for their implementation on topics relating to associations between the gut microbiome and personality traits, depression, anxiety, autism, schizophrenia, cognition, dementia and neurodegeneration. Additionally, this volume considers the influence of the maternal microbiome on brain development, with chapters covering Intervention, prevention, and the brain: prebiotics, probiotics, and fecal transplants, The microbiota-gut-brain axis: focus on the fundamental communication pathways, and Microbiome composition and locations.