Parasympathetic division and Sympathetic division of autonomic nervous system innervate the alimentary tract of the digestive system.
The autonomic nervous system is a peripheral nervous system component that controls involuntary physiologic processes such as heart rate, blood pressure, respiration, digestion, and sexual arousal. It is divided into three anatomical divisions: sympathetic, parasympathetic, and enteric.
All "automatic" body functions, such as breathing, heart rate, blood pressure, sweating, mouth-watering (salivating), and food movement through the intestines, are controlled by the autonomic nervous system (peristalsis). The hypothalamus is the primary brain site for autonomic nervous system central control, and the paraventricular nucleus is the primary hypothalamic site for this control. The dorsal longitudinal fasciculus is the main autonomic control pathway from the hypothalamus.
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