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Related Concept Videos

Functional Brain Systems: Limbic System01:15

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Related Experiment Video

Updated: Dec 10, 2025

Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
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Neural Circuits Underlying Innate Fear.

Chaoran Ren1, Qian Tao2

  • 1Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China. tchaoran@jnu.edu.cn.

Advances in Experimental Medicine and Biology
|August 28, 2020
PubMed
Summary
This summary is machine-generated.

Fear is a fundamental emotion triggered by perceived threats. This chapter explores brain circuits processing innate fear responses to visual stimuli in mice and humans, focusing on survival mechanisms.

Keywords:
AmygdalaInnate fearLoomingPulvinar

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Area of Science:

  • Neuroscience
  • Psychology
  • Animal Behavior

Background:

  • Fear is a fundamental emotion triggered by perceived threats, crucial for survival.
  • Innate fears, like those of predators or heights, are rapidly detected by animals and humans.
  • While animals face predators, humans often confront social threats, such as fearful facial expressions.

Purpose of the Study:

  • To summarize current knowledge on brain circuits involved in processing innate fear responses.
  • To investigate how visual stimuli trigger innate fear in both mice and humans.
  • To understand the evolutionary significance of fear responses in survival.

Main Methods:

  • Review of studies on innate fear responses in mice and humans.
  • Analysis of brain circuit mechanisms processing visual threat stimuli.
  • Comparative analysis of fear processing in different species.

Main Results:

  • Animals and humans exhibit rapid detection and response to threatening stimuli.
  • Predatory avoidance is a key survival mechanism for animals.
  • Social threats, like facial expressions, represent a significant challenge for humans.

Conclusions:

  • Understanding brain circuits for innate fear is vital for comprehending survival behaviors.
  • Fear processing mechanisms are conserved across species, with adaptations for different threats.
  • Further research into visual threat processing can illuminate both innate and social fear.