For many, anxiety is not just a "mental" state; it is a visceral, physical experience. Interoception is the physiological process of sensing the internal state of the body. When this system becomes dysregulated, normal bodily functions—like a heartbeat or a breath—are transformed into signals of imminent danger. Research by Garfinkel (2015), Critchley (2017), and Khalsa (2018) suggests that retraining interoceptive processing is perhaps the most vital step in long-term anxiety recovery.
In this clinical deep-dive, we explore the neuro-architecture of body-sensing, the "Bayesian" model of the anxious brain, and how Cognitive Behavioural Hypnotherapy (CBH) facilitates a profound shift in how we interpret the "weather report" of the body.
Interoception is often called the "Eighth Sense." While our external senses (exteroception) tell us about the world around us, interoception tells us about the world within. This complex signaling system involves several key players in the nervous system:
Clinical research by Sarah Garfinkel has revolutionised our understanding of why some people "feel too much" while others feel "disconnected." She identifies three distinct dimensions of interoception:
One of the most powerful concepts in modern neurobiology is the Predictive Processing Model. The brain does not sit around waiting for signals from the heart; it predicts what the heart should be doing based on past experiences (Learned Patterns).
In an anxious brain, the "Prediction Error" becomes skewed. If you have a history of panic, your brain predicts that a slight increase in heart rate means a panic attack is coming. When the signal arrives, the brain ignores the objective evidence (you just walked up some stairs) and prioritises the "Top-Down" prediction of a heart attack. This is why anxiety feels so "real"—your brain is literally hallucinating a catastrophe based on old data.
Palpitations are the most common interoceptive trigger. In the anxiety cycle, the brain focuses on the heart, which increases the salience of the beat, which causes more adrenaline, which increases the heart rate further. This is Anxiety Sensitivity in action.
Dyspnea (shortness of breath) in anxiety is often an interoceptive "glitch." The brain senses a slight rise in CO2 and overreacts, triggering an urge to over-breathe (hyperventilate). This creates a "smothering sensation," leading to further panic.
The gut-brain axis is a two-way interoceptive street. Stress signals from the brain alter gut motility (movement), and those gut sensations are sent back to the brain as "evidence" of danger. This is a primary driver of Functional Dyspepsia and IBS-like symptoms in anxious clients.
Chronic interoceptive monitoring is a classic safety behaviour. Many clients engage in "Body Scanning"—constantly checking their pulse, monitoring their throat for "lumps," or checking their stomach for "butterflies."
While this is intended to "be prepared," it actually results in Neural Hyper-Salience. The more you look for a sensation, the more the brain "turns up the volume" on that signal. Eventually, the signal becomes so loud that it drowns out all other sensory input, making it impossible to focus on the task at hand. This is the mechanism behind perfectionistic over-monitoring.
Based on Inhibitory Learning research by Michelle Craske, we intentionally induce the feared sensation in a safe, clinical environment. By doing so, we teach the brain that the sensation (e.g., dizziness or a racing heart) can exist without a catastrophe. This weakens the "Prediction Error" of the Bayesian brain.
In a hypnotic state, we use metaphors to "turn down the volume" on internal signals.
We use specific hypnotic breathing protocols to stimulate the Vagus Nerve. By increasing "Vagal Tone," we signal to the brain that the "Internal Weather" is clear, allowing the Soothing System to take over from the Threat System.
You likely have high Interoceptive Sensibility. Your brain's "volume control" for body signals is turned up.
The goal isn't to stop noticing it, but to stop caring about it.
The gut is lined with more neurons than the spinal cord. Hypnosis can help calm the dialogue between the brain and the gut.