Comparative three-dimensional connectome map of motor cortical projections in the mouse brain

Jeong, M., Kim, Y., Kim, J., Ferrante, D. D., Mitra, P. P., Osten, P., Kim, D. (2016) Comparative three-dimensional connectome map of motor cortical projections in the mouse brain. Scientific Reports, 6. ISSN 20452322

URL: http://www.ncbi.nlm.nih.gov/pubmed/26830143
DOI: 10.1038/srep20072

Abstract

The motor cortex orchestrates simple to complex motor behaviors through its output projections to target areas. The primary (MOp) and secondary (MOs) motor cortices are known to produce specific output projections that are targeted to both similar and different target areas. These projections are further divided into layer 5 and 6 neuronal outputs, thereby producing four cortical outputs that may target other areas in a combinatorial manner. However, the precise network structure that integrates these four projections remains poorly understood. Here, we constructed a whole-brain, three-dimensional (3D) map showing the tract pathways and targeting locations of these four motor cortical outputs in mice. Remarkably, these motor cortical projections showed unique and separate tract pathways despite targeting similar areas. Within target areas, various combinations of these four projections were defined based on specific 3D spatial patterns, reflecting anterior-posterior, dorsal-ventral, and core-capsular relationships. This 3D topographic map ultimately provides evidence for the relevance of comparative connectomics: motor cortical projections known to be convergent are actually segregated in many target areas with unique targeting patterns, a finding that has anatomical value for revealing functional subdomains that have not been classified by conventional methods. © 2016, Nature Publishing Group. All rights reserved.

Item Type: Paper
Subjects: organs, tissues, organelles, cell types and functions > tissues types and functions > motor cortex
organism description > animal > mammal > rodent > mouse
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons

Investigative techniques and equipment > Whole Brain Circuit Mapping
CSHL Authors:
Communities: CSHL labs > Mitra lab
CSHL labs > Osten lab
Depositing User: Matt Covey
Date Deposited: 22 Feb 2016 17:47
Last Modified: 22 Feb 2016 17:47
PMCID: PMC4735720
Related URLs:
URI: http://repository.cshl.edu/id/eprint/32370

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