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Updated: Aug 9, 2026
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Large-scale Three-dimensional Imaging of Cellular Organization in the Mouse Neocortex
Published on: September 5, 2018
Pyramidal cell types and circuit organization of the mouse insular cortex reveal functional specializations
Bart C Jongbloets1,2,3, Yang Chen4,5, Michael A Muniak4
1Vollum Institute, Oregon Health & Science University, Portland, OR, USA. b.c.jongbloets@uva.nl.
Nature Neuroscience
|August 7, 2026
Summary
Researchers identified 42 new types of mouse insular cortex neurons based on their structure and electrical properties. This discovery provides a detailed map of the insula, aiding future studies on bodily homeostasis and emotion.
Area of Science:
- Neuroscience
- Cellular Biology
- Computational Neuroscience
Background:
- The insular cortex integrates internal and external sensory information for homeostasis, emotion, and learning.
- Its cellular and circuit mechanisms are less understood than primary cortical areas.
Purpose of the Study:
- To comprehensively characterize the cellular and circuit substrates of the mouse insular cortex.
- To establish a quantitative, structure-and-function foundation for insular neuroscience.
Main Methods:
- Quantified dendritic morphology, projections, electrical properties, and local inputs of 1,130 mouse insular pyramidal neurons.
- Mapped neurons onto a quantitative Nissl-derived model of the insula.
- Utilized advanced algorithms to classify neuronal types.
Main Results:
- Defined 21 morphological, 12 electrical, and 9 input neuronal types, some unique to the insula.
- Demonstrated that morphological features predict neuronal inputs, electrical properties, and projection targets.
- Identified differential distribution of eight morphological types between anterior and posterior insula, enabling subregion demarcation.
- Revealed intra-insular excitatory inputs bridging long-range circuits linking sensory information to behavior.
Conclusions:
- Established a detailed classification of insular cortex neuronal types based on multi-parameter characterization.
- Provided a quantitative framework for understanding insular cortex organization and function.
- Highlighted the role of specific neuronal types in integrating sensory information and mediating behavior.
