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Nirva Institute · Human Experience · Human Experience Series

Body Awareness

Interoception is the ground on which experience is built.

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The Nirva InstitutePublished 2026≈ 7 min read
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Interoception — the sensing of internal bodily state — was once treated as a marginal topic in neuroscience, one small sense among many. It is now understood to be the substrate on which the rest of experience is built. Emotion, decision, identity, and the very sense of being a self all trace back to interoceptive processing in the insular cortex and its subcortical partners.

§ 1

The insular cortex as hub

A. D. Craig’s work established the anterior insular cortex as the region where interoceptive signals become subjective feeling — the physiological condition of the body becoming the felt sense of the self.9,10

Neuroimaging has consistently confirmed that interoceptive accuracy correlates with anterior insular gray matter and function.11

§ 2

Interoception underlies emotion

The theory of constructed emotion (see the Emotion article in this series) treats interoceptive signals as the raw material from which emotions are built. Without body signal, no felt emotion.3,5

§ 3

Disorders of interoception

Interoceptive dysregulation is now implicated across a wide range of conditions — anxiety, depression, PTSD, eating disorders, chronic pain, functional gastrointestinal disorders, and more. The pattern is remarkably consistent: when interoception is disrupted, so is the experience of self and emotion.12,17,16

§ 4

The NSI reading

Nervous System Intelligence begins with interoception — with the willingness and skill to feel the body as it is. Not because feeling is a virtue in itself, but because it is the input to everything else.

Foundational NSI Concepts

The pillar ideas this article rests on

Cornerstone

What Is Nervous System Intelligence?

Term

Interoception

Cornerstone

Bottom-Up Healing

Scientific References

Primary literature

AMA numeric style. Citation numbers are unified across the Nirva Life ecosystem — the same number refers to the same reference across every library article. Full registry is anchored in the Cornerstone Paper.

  1. 3.Barrett LF. The theory of constructed emotion: an active inference account of interoception and categorization. Soc Cogn Affect Neurosci. 2017;12(1):1-23. PubMed ↗
  2. 5.Seth AK. Interoceptive inference, emotion, and the embodied self. Trends Cogn Sci. 2013;17(11):565-573. PubMed ↗
  3. 9.Craig AD. How do you feel? Interoception: the sense of the physiological condition of the body. Nat Rev Neurosci. 2002;3(8):655-666. PubMed ↗
  4. 10.Craig AD. How do you feel — now? The anterior insula and human awareness. Nat Rev Neurosci. 2009;10(1):59-70. PubMed ↗
  5. 11.Critchley HD, Wiens S, Rotshtein P, Öhman A, Dolan RJ. Neural systems supporting interoceptive awareness. Nat Neurosci. 2004;7(2):189-195. PubMed ↗
  6. 12.Quigley KS, Kanoski S, Grill WM, Barrett LF, Tsakiris M. Functions of interoception: from energy regulation to experience of the self. Trends Neurosci. 2021;44(1):29-38. PubMed ↗
  7. 16.Disrupted Profiles of Interoception and Mental Health in Youths: A Systematic Review. 2025. PubMed ↗
  8. 17.Diminished Interoceptive Accuracy in Attention-Deficit/Hyperactivity Disorder: A Systematic Review. 2025. PubMed ↗

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