Vagus Nerve

The vagus nerve — Latin for "wandering nerve" — is the tenth cranial nerve, the physiological anchor of the parasympathetic nervous system and the bridge between brainstem and viscera. In Pleroma's contemplative practice it is the body's pneumatic conductor — the pathway the practice follows from the breath to the Sacred Pause.

Definition

The tenth cranial nerve, longest in the autonomic nervous system, responsible for parasympathetic tone across heart, lungs, gut, and throat. Its activity level is usually estimated as vagal tone or heart rate variability.

Primary source

• Henry Gray, Anatomy of the Human Body, Neurology, The Vagus Nerve, pp. 910–911, ed. Warren H. Lewis (Lea & Febiger, 20th ed., 1918): the tenth cranial nerve's unusually long course from the medulla through neck and thorax to the abdominal viscera. Open-access copy

In Practice

Polyvagal writers list slow diaphragmatic breathing, humming, cold water on the face and a long exhale as the practices they associate with vagal tone and with a move from sympathetic (fight/flight/fawn) toward parasympathetic availability. In their account this shift restores prefrontal cortex function and widens the stimulus-response gap, which they call the neurological substrate of conscious choice.

Stefan's Alkimia. (2026, October 4). Vagus Nerve. Pleroma Guide. https://pleroma.guide/en/lexicon/vagus-nerve

Stefan's Alkimia. “Vagus Nerve.” Pleroma Guide, 4 Oct. 2026, pleroma.guide/en/lexicon/vagus-nerve.

Stefan's Alkimia. “Vagus Nerve.” Pleroma Guide. April 21, 2026. Last modified October 4, 2026. https://pleroma.guide/en/lexicon/vagus-nerve.

@online{alkimia2026vagusnerve,
  author = {{Stefan's Alkimia}},
  title = {{Vagus Nerve}},
  organization = {{Pleroma Guide}},
  date = {2026-04-21},
  year = {2026},
  note = {Last modified 2026-10-04},
  url = {https://pleroma.guide/en/lexicon/vagus-nerve},
  langid = {english}
}