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Rapid development of motion-streak coding in the mouse visual cortex.

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  • 1Department of Biology, University of Virginia, Charlottesville, VA 22904, USA.

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|January 3, 2023
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The development of higher visual areas (HVAs) in mice reveals early orientation and direction selectivity. Motion coding matures over time, with motion-streak selectivity emerging later in development.

Area of Science:

  • Neuroscience
  • Visual processing
  • Developmental biology

Background:

  • The cellular-level development of higher visual areas (HVAs) is poorly understood.
  • Understanding visual cortex development is crucial for comprehending visual perception.

Purpose of the Study:

  • To investigate the developmental trajectory of visual response properties in mouse HVAs.
  • To compare the maturation of visual selectivity in HVAs (LM, AL) with V1.

Main Methods:

  • Utilized 2-photon calcium imaging in awake, behaving mice.
  • Recorded neural activity in lateromedial (LM), anterolateral (AL), and primary visual cortex (V1).
  • Analyzed developmental changes in orientation, direction, and motion-speed selectivity.
Keywords:
Biological sciencesDevelopmental neuroscienceNeuroscienceSensory neuroscience

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Last Updated: Aug 15, 2025

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Main Results:

  • Neurons in HVAs exhibited orientation and direction selectivity comparable to V1 at eye opening.
  • This selectivity sharpened in HVAs during the weeks following eye opening.
  • Basic motion coding (perpendicular axis, slow speeds) was present at eye opening.
  • Motion-streak coding (parallel axis, high speeds) developed later, becoming prominent in older animals.

Conclusions:

  • Mouse HVAs demonstrate early, albeit less refined, visual selectivity at eye opening.
  • The development of motion processing, particularly motion-streak coding, is a protracted process in HVAs.
  • This study provides cellular-level insights into the maturation of the visual processing hierarchy.