The vagus nerve is partially responsible for parasympathetic control of the heart, lungs, and digestive tract[1]. The parasympathetic nervous system is more commonly referred to as the “rest and digest” state of the body. This is on contrast to the sympathetic nervous system, which is responsible for the “fight or flight” state of the body[2]. The vagus nerve leaves the medulla oblongata and travels down the neck, chest, and finally the abdomen[1]. It comprises 80% to 90% of afferent nerves containing mainly sensory information about the body’s organs to the central nervous system (CNS)[3]. The vagus nerve doubles as a sensory and motor nerve.
A few responsibilities of the vagus nerve include controlling heart rate, sweating, movement of muscles in the mouth, including speech, and satiation following food consumption[3].
References:
1118 Outlet Collection Way #101
Auburn, WA 98001