The body is always saying something.
A tightening across the shoulders before a difficult conversation. A sudden opening in the chest when something long-awaited finally arrives. A low, persistent heaviness that has no clear cause but colors everything. These signals arrive continuously — below the threshold of language, below the level at which most attention is directed — shaping mood, influencing decision-making, organizing the emotional tone of ordinary experience.
Interoception is the name for this continuous stream of information from the interior of the body to the brain. And its relationship with imagination is closer than most people realize.
What Interoception Is
Interoception refers to the brain’s perception of the internal state of the body — signals arising from the heart, lungs, gut, skin, and musculature that are continuously relayed to the brain and integrated into its ongoing construction of experience (Craig, 2009).
For a long time, interoception was understood primarily as a regulatory system — the mechanism by which the brain monitors and adjusts physiological states. More recent research has expanded this picture considerably. The insula, the brain region most centrally involved in interoceptive processing, is also deeply implicated in emotional awareness, empathy, the sense of self, and the subjective quality of inner experience (Craig, 2009; Damasio, 1994).
The body, in this framework, is generating meaning continuously — long before conscious attention arrives to organize it into thought.
This interoceptive awareness is closely related to what philosopher and psychotherapist Eugene Gendlin later described as the felt sense — a bodily awareness of a situation that carries implicit meaning before it becomes language. While interoception refers to the physiological signaling of the body, the felt sense describes how that signaling is experienced subjectively when attention turns toward it.
The Body as the Ground of Inner Imagery
When inner imagery arises — whether spontaneously in daydream or memory, or deliberately in imaginative practice — it does not float free of the body. It lands in it. Images carry somatic texture. A remembered scene tightens the throat or softens the shoulders. An imagined encounter quickens the pulse or stills it. The emotional quality of an inner image is felt as much as it is seen.
This connection runs in both directions. Just as imagery activates somatic responses, somatic states shape the imagery that arises. A body held in chronic tension generates a different quality of inner imagery than one resting in ease. The autonomic nervous system — the branch of the nervous system governing arousal, threat response, and rest — continuously colors the tone of inner experience, influencing which images feel possible and which feel out of reach (Porges, 2011).
Research in embodied cognition has increasingly confirmed what clinical practitioners have long observed: imagination and bodily experience are not parallel processes. They are aspects of a single integrated system (Barsalou, 2008).
Interoceptive Awareness as a Therapeutic Resource
When attention is directed toward the body with genuine curiosity — toward the specific quality of a sensation, its location, its texture, the way it changes as awareness rests with it — something often begins to shift. Sensations that were diffuse become more distinct. Emotional states that were overwhelming begin to differentiate into something more workable.
This is not simply relaxation. It is a form of information gathering. The body is holding something — a residue of experience, an unprocessed emotion, an implicit knowing — and interoceptive attention creates the conditions in which that holding can begin to be felt, named, and eventually integrated.
Peter Levine, developer of Somatic Experiencing, described how traumatic activation tends to remain locked in the body when the natural completion of a threat response has been interrupted (Levine, 1997). Directed interoceptive attention — tracking sensation with patience and precision — allows the nervous system to complete what was left unfinished, moving through activation toward discharge and resolution.
Where Interoception and Imagery Meet
The richest territory in imagination-based inner work often opens at the intersection of bodily sensation and inner image. A sensation is located in the body — a tightness, a warmth, a hollow quality — and attention rests with it. An image arises that seems to belong to that sensation. The image is engaged, and the body responds with a further shift in sensation. The process moves back and forth between these two registers — somatic and imaginal — each informing and deepening the other.
This is the lived experience of what neuroscience describes as the integration of interoceptive and imaginative processing. The insula, the anterior cingulate cortex, and the default mode network are all active in this territory — bridging bodily signal, emotional awareness, and the generation of meaning through inner imagery (Immordino-Yang et al., 2012).
When the body and the imagination are in genuine contact, inner experience becomes both more vivid and more workable. The imagery carries somatic weight. The sensations carry symbolic meaning. And the whole of what is present becomes available in a way that neither register offers alone.
Further exploration
How bodily awareness stabilizes imaginal work is explored in: Interoceptive Grounding: Reconnecting with the Body Through Imagination
And for a deeper look at the role of the body in imaginal transformation: Somatic Imagination: The Missing Link in Stress Regulation
