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Related Experiment Video

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Using Looming Visual Stimuli to Evaluate Mouse Vision

Using Looming Visual Stimuli to Evaluate Mouse Vision

Published on: June 13, 2019

Single-nucleus profiling decoding the subcortical visual pathway evolution of vertebrates.

Kuo Liao^1,2, Ya Xiang^1,3, Youning Lin^1,4

¹BGI Research, Hangzhou 310030, China.

|March 28, 2025

Summary

This study reveals differences in visual processing pathways between birds and mammals using single-nucleus RNA sequencing. It identifies shared molecules, offering new insights into vertebrate visual system evolution.

Keywords:

Evolutionary developmental biology Model organism Ornithology Transcriptomics

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Area of Science:

Neuroscience
Evolutionary Biology
Comparative Genomics

Background:

Vertebrate visual systems have undergone significant evolutionary transformations.
Understanding the differences and evolutionary changes in primary visual pathways remains a challenge.
Emerging technologies facilitate comprehensive comparative analyses.

Purpose of the Study:

To construct the cellular landscape of the avian optic tectum using single-nucleus RNA sequencing (snRNA-seq).
To compare the avian optic tectum with mammalian snRNA-seq datasets.
To identify differences and shared molecular components in vertebrate visual pathways.

Main Methods:

Single-nucleus RNA sequencing (snRNA-seq) of the avian optic tectum.
Integration of avian and mammalian snRNA-seq datasets.
Comparative analysis of cellular composition and molecular markers.

Main Results:

Detailed cellular landscape of the avian optic tectum was constructed.
Differences in the density of specific thalamic-projecting excitatory neurons were found between birds and mammals.
Shared molecules were identified across dominant vertebrate visual pathways.

Conclusions:

This research provides a novel focus on the evolution of visual pathways in vertebrates.
It highlights key differences in neuronal populations within the retinotectal pathway.
A framework for comparative analysis of visual systems is established.