<unk>  refers to gastrointestinal tract<unk>  circuits where afferent and efferent fibers of the vagus nerve coordinate responses to gut stimuli via the dorsal vagal complex in the brain. The<unk>  controls contraction of the gastrointestinal muscle layers in response to distension of the tract by food.  This<unk>  also allows for the accommodation of large amounts of food in the gastrointestinal tracts.
The parasympathetic vagus nerve composed of both afferents and efferents carries signals from stretch receptors, osmoreceptors, and chemoreceptors to dorsal vagal complex where the signal may be further transmitted to autonomic centers in the medulla. Efferent fibers of the vagus then carry signals to the gastrointestinal tract up to 2/3 of the Tranverse Colon (coinciding with the second GI watershed point).
Vagovagal reflex
Gastrocolic reflex
Acoustic reflex
Hemodynamic response
Mammalian diving reflex
Baroreflex
Kumada coupling
Fight-or-flight response