Light at night affects hippocampal and nidopallial cytoarchitecture: Implication for impairment of brain function in diurnal corvids

Oct 6, 2018Journal of experimental zoology. Part A, Ecological and integrative physiology

Nighttime Light Changes Cell Structure in Memory and Thinking Areas, Linked to Brain Problems in Day-Active Crows

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Abstract

Light at night (LAN) is associated with a significant decrease in soma size of neurons in the hippocampus and lateral caudal nidopallium of Indian house crows.

  • Exposure to constant light or dim light at night resulted in reduced soma size of neurons, indicating decreased neuronal plasticity.
  • Neuronal density in both the hippocampus and lateral caudal nidopallium remained unchanged despite the reduced soma size.
  • A decrease in the number of glial cells was observed, leading to a lower glia-neuron ratio that positively correlated with soma size.
  • These findings highlight the potential negative effects of LAN on brain cytoarchitecture in a diurnal species.

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