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Related Experiment Video

Updated: Mar 13, 2026

Targeted Labeling of Neurons in a Specific Functional Micro-domain of the Neocortex by Combining Intrinsic Signal and Two-photon Imaging

Targeted Labeling of Neurons in a Specific Functional Micro-domain of the Neocortex by Combining Intrinsic Signal and Two-photon Imaging

Published on: December 12, 2012

Mixed functional microarchitectures for orientation selectivity in the mouse primary visual cortex.

Satoru Kondo^1,2,3, Takashi Yoshida^1,2,3, Kenichi Ohki^1,2,3

¹Department of Molecular Physiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.

Nature Communications

|October 22, 2016

Summary

Neurons in the mouse primary visual cortex (V1) show weak vertical clustering by orientation preference within minicolumns, suggesting a mixed functional organization in cortical architecture.

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Last Updated: Mar 13, 2026

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Area of Science:

Neuroscience
Cortical Architecture
Visual Processing

Background:

The minicolumn, the smallest anatomical module in the cortex, is debated as a functional unit.
Rodent primary visual cortex (V1) exhibits horizontal mixing of neurons with different orientation preferences.
Vertical functional organization within V1 minicolumns remains largely unexamined.

Purpose of the Study:

To investigate the vertical functional organization of neurons in the mouse primary visual cortex (V1).
To determine if neurons with similar orientation preferences cluster vertically within minicolumns.

Main Methods:

Analysis of neuronal orientation preference in the mouse V1.
Examination of vertical and horizontal clustering patterns of neurons within minicolumn scale.

Main Results:

Neurons with similar orientation preferences exhibit weak but significant vertical clustering over short distances.
Horizontal clustering of similarly tuned neurons is observed at the scale of a minicolumn.
Vertical clustering is not uniform, with some minicolumns showing diverse orientation preferences.

Conclusions:

Mouse V1 displays a mixed organization, featuring vertical clusters of similarly tuned neurons in some minicolumns.
This organization may represent a compromise between brain size and maintaining functional specificity.
The findings contribute to understanding the functional architecture of the primary visual cortex.