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Chronic bisphenol A exposure triggers visual perception dysfunction through impoverished neuronal coding ability in

Fan Hu1, Guangwei Xu2, Linke Zhang3

  • 1School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, Anhui, People's Republic of China. hufan@hfut.edu.cn.

Archives of Toxicology
|November 16, 2021
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Summary
This summary is machine-generated.

Chronic exposure to bisphenol A (BPA) impairs contrast sensitivity. BPA disrupts neuronal coding in the visual cortex, leading to reduced signal-to-noise ratio and increased response variability, impacting visual perception.

Keywords:
BPAContrast perceptionContrast response functionNoise correlationResponse variability

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Area of Science:

  • Neuroscience
  • Environmental Health
  • Visual Perception

Background:

  • Contrast sensitivity is crucial for visual perception.
  • The impact of chronic environmental xenoestrogen exposure, specifically bisphenol A (BPA), on contrast sensitivity is not well understood.

Purpose of the Study:

  • To investigate the effects of chronic BPA exposure on contrast sensitivity (CS) in adult cats.
  • To explore the underlying neuronal coding mechanisms in the primary visual cortex (A17) affected by BPA.

Main Methods:

  • Adult cats were exposed to BPA (0.4 mg/kg/day) for 14 days.
  • Contrast sensitivity was assessed behaviorally.
  • Electrophysiological recordings and interneuronal correlation analysis were performed in the primary visual cortex (A17).

Main Results:

  • BPA exposure significantly reduced contrast sensitivity across tested spatial frequencies.
  • Increased noise correlation was observed in the primary visual cortex of BPA-exposed cats.
  • Single neuron analysis revealed decreased CS, reduced signal-to-noise ratio, and increased response variability in A17.

Conclusions:

  • Chronic BPA exposure impairs contrast perception in cats.
  • These deficits are linked to disrupted neuronal coding, including increased noise correlation and reduced signal-to-noise ratio in the primary visual cortex.
  • The findings suggest BPA negatively impacts visual processing through neurotoxic effects on the visual cortex.