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Related Experiment Video

Updated: Jan 30, 2026

Author Spotlight: Unveiling Neural Coding and Mechanisms of Visual Processing in the Superior Colliculus
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A Distinct Circuit for Biasing Visual Perceptual Decisions and Modulating Superior Colliculus Activity through the

Kara K Cover1, Kerry Elliott2, Sarah M Preuss2

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The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 28, 2026
PubMed
Summary

The posterior striatum (PS) controls visual decisions in rodents via a distinct pathway from the dorsomedial striatum (DMS). Activating the PS pathway biases decisions based on context and reward, modulating the superior colliculus (SC).

Keywords:
in vivo electrophysiologymouserodenttail of the striatumvisionvisual attention

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Area of Science:

  • Neuroscience
  • Decision-making
  • Visual processing

Background:

  • The basal ganglia are crucial for visual perceptual decisions.
  • The posterior striatum (PS) receives significant visual input but its role is unexplored.
  • The dorsomedial striatum (DMS) is a known pathway for visual cortex input.

Purpose of the Study:

  • To investigate the role of the PS in visual perceptual decisions.
  • To compare the PS direct pathway with the DMS direct pathway.
  • To examine the modulation of the superior colliculus (SC) by these pathways.

Main Methods:

  • Optogenetic stimulation of D1-MSNs in the PS and DMS of mice.
  • Mice performed a visual change-detection task.
  • Neuronal activity in the SC was recorded.

Main Results:

  • PS D1-MSN activation biased visual decisions based on context, timing, and reward.
  • The PS and DMS direct pathways are anatomically segregated.
  • Both pathways modulated SC neuronal activity, targeting different neurons with opposite effects.

Conclusions:

  • The PS provides a distinct route for controlling visual decisions, parallel to the DMS.
  • The PS pathway has unique anatomical and functional properties.
  • These findings reveal a novel basal ganglia circuit for visual decision-making.