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Vagus Nerve

Meaning

The Vagus Nerve, or Cranial Nerve X, is the longest nerve in the autonomic nervous system, serving as a bidirectional highway communicating sensory information from the gut and organs back to the brainstem and motor commands from the brain to regulate visceral function. Its primary role in hormonal health is mediating the afferent signaling that informs the brain about metabolic status and emotional arousal. It is central to the gut-brain axis communication.