For example, brain–gut interactions are biochemical signaling that takes place between the gastrointestinal tract and the central nervous system.
[3] Brain–muscle interactions involve both efferent nerve fibers that transmit action potentials to the muscles to generate muscle contractions and afferent nerve fibers that transmit somatosensory information back to the central nervous system.
[9] Synchrony between slow pulse fluctuations (related to sympathetic activity) and brain fMRI signal has revealed a network of sensory brain regions that appear to be relevant for characterizing human personality and emotions.
[10] These analyses can be extended to investigate interactions between multiple organ systems that together form a brain–body network.
[11] The brain–body interactions are supported by peripheral nervous system that connects the CNS to the limbs and organs.