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Related Experiment Video

Updated: Feb 24, 2026

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
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Brief Novel Visual Experience Fundamentally Changes Synaptic Plasticity in the Mouse Visual Cortex.

Shuo Li1, Laijian Wang1, Xiaoxiu Tie1,2

  • 1Guangdong Province Key Laboratory of Brain Function and Disease, Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080 China.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|August 20, 2017
PubMed
Summary
This summary is machine-generated.

Newly discovered mGluR5-dependent long-term potentiation (LTP) in the visual cortex is independent of NMDARs. This novel form of synaptic plasticity is transiently induced by light exposure in dark-reared mice, suggesting dual plasticity mechanisms.

Keywords:
dark rearinglight exposurepostnatal developmentsynaptic plasticityvisual cortex

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Area of Science:

  • Neuroscience
  • Synaptic Plasticity
  • Visual Cortex Development

Background:

  • Long-term potentiation (LTP) modifies synaptic responses in the neocortex.
  • Visual deprivation enhances NMDAR-dependent LTP in the visual cortex, a process known as metaplasticity.

Purpose of the Study:

  • To investigate the effects of light re-exposure on LTP induction after dark rearing from birth.
  • To characterize a novel form of LTP in the visual cortex.

Main Methods:

  • Electrophysiological recordings in layer 2/3 pyramidal cells of the visual cortex in mice.
  • Manipulation of visual experience (dark rearing and light exposure).
  • Pharmacological assessment of NMDAR and mGluR5 involvement.

Main Results:

  • A novel NMDAR-independent LTP was revealed by light exposure in dark-reared mice.
  • This mGluR5-dependent LTP requires intracellular Ca2+ rise, CaMKII and PKC activity, and protein synthesis.
  • The capacity for mGluR5-LTP is transient, observed only after short light exposure (10-12 h) in dark-reared mice.

Conclusions:

  • The visual cortex exhibits two distinct activity-dependent synaptic plasticity systems: NMDAR-LTP and mGluR5-LTP.
  • mGluR5-LTP, unmasked by brief visual experience, may facilitate the rapid establishment of receptive field properties.
  • These findings highlight the coexistence of distinct plasticity mechanisms in the visual cortex, similar to the hippocampus.