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Related Experiment Video

Updated: May 16, 2026

Real-time Analysis of Gut-brain Neural Communication: Cortex wide Calcium Dynamics in Response to Intestinal Glucose Stimulation

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Cortical visual areas process intestinal information during slow-wave sleep.

I N Pigarev¹, V A Bagaev, E V Levichkina

¹Institute for Problems of Information Transmission (Kharkevich Institute), Russian Academy of Sciences, Moscow, Russia. pigarev@iitp.ru

Neurogastroenterology and Motility

|December 11, 2012

Summary

During slow-wave sleep, the cerebral cortex processes duodenal activity, a link not observed when awake. This suggests a shift to interoceptive information processing during sleep.

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Area of Science:

Neuroscience
Gastroenterology
Sleep Science

Background:

Previous research demonstrated that stimulating the stomach and small intestine during sleep elicits cortical neuronal and EEG responses.
This study aimed to link natural duodenal myoelectrical activity with cortical neuronal activity during sleep.

Purpose of the Study:

To correlate natural duodenal myoelectrical activity with cortical neuronal activity in sleeping cats.
To investigate a potential causal relationship between duodenal activity and cortical function during slow-wave sleep.

Main Methods:

Recorded duodenal myoelectrical activity from the duodenal wall in naturally sleeping cats.
Simultaneously recorded single-neuron activity from three cortical visual areas in the same animals.
Analyzed the causal interrelationship between duodenal and cortical activity during slow-wave sleep.

Main Results:

Approximately 30% of studied cortical neurons exhibited firing rate changes synchronized with duodenal peristaltic cycles.
These neurons showed selectivity for specific patterns of duodenal myoelectrical activity.
This observed interrelationship between duodenal and cortical activity was absent in awake animals.

Conclusions:

The findings support the hypothesis that the cerebral cortex shifts its processing focus during sleep.
During sleep, the cortex appears to prioritize processing of interoceptive (internal body) information over exteroceptive (external world) information.