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Mapping the Function of Whole-Brain Projection at the Single Neuron Level
Wei Zhou1,2, Shanshan Ke1,2, Wenwei Li1,2
1Britton Chance Center and MoE Key Laboratory for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 13, 2022
Summary
Researchers developed a new method to map single neuron function to their whole-brain projections. This reveals how neural projection patterns relate to information processing in the brain.
Area of Science:
- Neuroscience
- Systems Neuroscience
- Computational Neuroscience
Background:
- Understanding neural circuit assembly requires linking single neuron function to axonal projections.
- Existing methods lack the ability to map neuronal function to whole-brain projection patterns.
Purpose of the Study:
- To develop a novel pipeline for mapping single-neuron functional properties to their complete axonal projections across the whole brain.
- To investigate the relationship between functional selectivity and projection architecture in mouse visual cortex layer 2/3 neurons.
Main Methods:
- Combined in vivo two-photon calcium imaging with high-resolution whole-brain imaging using sparse labeling and genetically encoded calcium indicators (GCaMP6).
- Utilized high-definition fluorescent micro-optical sectioning tomography (HD-fMOST) for whole-brain projection mapping.
- Developed a cross-modality cell matching technique to obtain functional annotation of whole-brain projection at the single-neuron level (FAWPS).
Main Results:
- Successfully mapped functional preferences to axonal projection features for individual layer 2/3 neurons in the mouse visual cortex.
- Identified functional preferences within projection motifs and correlated axonal length in specific targets (MOs) with neuronal orientation selectivity.
- Demonstrated that projection motif-defined neurons constitute functionally specific information flow pathways.
Conclusions:
- The developed pipeline enables the study of functional information transmission at the single-neuron level.
- Projection strength in specific targets correlates with the clarity of transmitted information.
- This approach provides new insights into the principles governing neuronal information transmission and neural circuit organization.
