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Linking sensory experience to bodily states in the insular cortex
Adonis Yiannakas1, Haneen Kayyal2, Sailendrakumar Kolatt Chandran2
1School of Medicine (Frankfurt Branch), European University of Cyprus, Frankfurt am Main, Germany; Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.
Trends in Neurosciences
|August 6, 2026
Summary
The insular cortex integrates bodily signals to link sensory cues with future physiological states, enabling adaptive behaviors. This brain region is crucial for learning associations, even with delayed consequences.
Area of Science:
- Neuroscience
- Behavioral Science
- Physiology
Background:
- Adaptive behavior relies on associating sensory input with delayed physiological outcomes.
- The insular cortex integrates diverse internal and external information, including sensory, visceral, and affective data.
- Understanding how the insula links cues to bodily states is key to explaining learned responses.
Purpose of the Study:
- To review evidence on how insular circuits connect external cues with predicted bodily states.
- To explore the role of the insular cortex in learning associations with delayed physiological consequences.
- To examine the neural and molecular mechanisms underlying these learned predictions.
Main Methods:
- Review of studies primarily from mouse and rat models, with reference to human research.
- Focus on conditioned taste aversion and conditioned immune responses as models of insular function.
- Analysis of research on anterior and posterior insular circuits, plasticity, and molecular mechanisms.
Main Results:
- Insular circuits are critical for coupling external stimuli to predicted internal bodily states.
- Conditioned taste aversion and immune responses demonstrate the insula's role in learning delayed associations.
- Specific insular circuits, plasticity, and inhibitory mechanisms are involved in encoding and retrieving these associations.
Conclusions:
- The insular cortex acts as a state-dependent hub for generating and regulating learned predictions about the body.
- This predictive function is essential for adaptive behavior in response to delayed physiological consequences.
- The insula's integration of diverse information supports its role in anticipating future bodily needs and states.
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