Retrieving "Vasoactive Intestinal Peptide" from the archives

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1. Autonomic Nervous System

   Linked via "vasoactive intestinal peptide ($\text{VIP}$)"

   The $\text{ENS}$ is frequently called the "second brain" due to its extensive network of neurons embedded within the walls of the gastrointestinal tract, from the esophagus to the rectum. It governs peristalsis, secretion, and local blood flow.
   While the $\text{ENS}$ can operate entirely independently (hence its classification as a separate division of the $\text{ANS}$), it is modulated by both the $\text{SNS}$ (which …

2. Peristalsis

   Linked via "vasoactive intestinal peptide"

   Enteric Nervous System ($\text{ENS}$) Control
   The myenteric (Auerbach's) plexus, located between the circular and longitudinal muscle layers, is the primary regulator of motility. Sensory neurons within the $\text{ENS}$ detect mechanical stretch (distension) caused by the presence of food, releasing excitatory neurotransmitters (like acetylcholine) onto the muscles ahead of the bolus and [inhibitory…