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The Enteric Nervous System

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Interaction with gut microbiota

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Neuronal cells in the enteric system interact with the gut flora, affecting gut health and immunity, with bidirectional communication with the CNS.

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Neuroplasticity in the enteric nervous system

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The ENS exhibits a form of neuroplasticity, adapting its functions over time, which can be affected by central nervous system activity.

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Blood flow regulation in the gastrointestinal system

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The enteric nervous system helps dilate or constrict blood vessels to regulate blood flow to the gut, influenced by signals from the CNS.

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Modulation of visceral pain

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The enteric nervous system can modulate the perception of pain from the gastrointestinal tract, with the CNS contributing to pain modulation.

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Control of the esophageal and anal sphincters

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The enteric nervous system regulates the opening and closing of sphincters, coordinating with the CNS to manage swallowing and defecation.

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Maintenance of the intestinal mucosal barrier

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Enteric neurons can modulate the integrity of the gut barrier, with stress-related signals from the CNS affecting this function.

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Gastrointestinal reflex pathways

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The enteric nervous system can independently coordinate reflexes for functions such as swallowing and defecation, while still being modulated by the CNS.

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Control of gastrointestinal motility

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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.

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Modulation of immune responses in the gut

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The enteric nervous system can influence local immune responses, potentially affecting inflammation through interactions with the CNS.

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Regulation of digestive secretions

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Enteric neurons release neurotransmitters that modulate the secretion of enzymes and hormones necessary for digestion, with feedback mechanisms involving the CNS.

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Sensory functions

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The enteric system senses changes in chemical composition and mechanical stimuli in the gut, relaying sensory information to the CNS.

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Local control of pH levels

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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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