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The Enteric Nervous System
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Interaction with gut microbiota
Neuronal cells in the enteric system interact with the gut flora, affecting gut health and immunity, with bidirectional communication with the CNS.
Neuroplasticity in the enteric nervous system
The ENS exhibits a form of neuroplasticity, adapting its functions over time, which can be affected by central nervous system activity.
Blood flow regulation in the gastrointestinal system
The enteric nervous system helps dilate or constrict blood vessels to regulate blood flow to the gut, influenced by signals from the CNS.
Modulation of visceral pain
The enteric nervous system can modulate the perception of pain from the gastrointestinal tract, with the CNS contributing to pain modulation.
Control of the esophageal and anal sphincters
The enteric nervous system regulates the opening and closing of sphincters, coordinating with the CNS to manage swallowing and defecation.
Maintenance of the intestinal mucosal barrier
Enteric neurons can modulate the integrity of the gut barrier, with stress-related signals from the CNS affecting this function.
Gastrointestinal reflex pathways
The enteric nervous system can independently coordinate reflexes for functions such as swallowing and defecation, while still being modulated by the CNS.
Control of gastrointestinal motility
The enteric nervous system regulates the contraction and relaxation of smooth muscle in the GI tract, coordinating peristalsis and segmental contractions in interaction with the CNS via the vagus nerve.
Modulation of immune responses in the gut
The enteric nervous system can influence local immune responses, potentially affecting inflammation through interactions with the CNS.
Regulation of digestive secretions
Enteric neurons release neurotransmitters that modulate the secretion of enzymes and hormones necessary for digestion, with feedback mechanisms involving the CNS.
Sensory functions
The enteric system senses changes in chemical composition and mechanical stimuli in the gut, relaying sensory information to the CNS.
Local control of pH levels
The enteric nervous system helps regulate the acidity in different regions of the gut, adjusting secretion in response to local conditions and CNS input.
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