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Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats
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Sex differences in fear extinction.

E R Velasco1, A Florido1, M R Milad2

  • 1Institut de Neurociències, Universitat Autònoma de Barcelona, Spain.

Neuroscience and Biobehavioral Reviews
|May 27, 2019
PubMed
Summary
This summary is machine-generated.

Research on fear extinction lacks female subjects, hindering understanding of sex differences in fear-related disorders. This review examines animal and human studies on sex-based variations in fear extinction mechanisms.

Keywords:
ExtinctionFearFemaleHumanMaleRodentSex

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Psychology

Background:

  • Fear extinction research has grown exponentially, yet few studies include female subjects.
  • A significant knowledge gap exists regarding the mechanistic processes underlying sex differences in fear extinction.
  • Fear-related disorders are twice as prevalent in women, highlighting the need to understand sex-based differences.

Purpose of the Study:

  • To review current animal and human studies on sex differences in fear extinction.
  • To explore structural and functional approaches to understanding these differences.
  • To elucidate the contribution of sex and hormones to fear extinction in normal and pathological conditions.

Main Methods:

  • Systematic review of adult animal and human studies.
  • Analysis of structural and functional neurobiological data.
  • Examination of behavioral findings related to fear extinction.

Main Results:

  • Significant sex differences are reported in fear extinction across reviewed studies.
  • Hormonal influences and sex-specific neural pathways contribute to these variations.
  • These differences may explain the higher prevalence of fear disorders in women.

Conclusions:

  • Including female subjects is crucial for a comprehensive understanding of fear extinction.
  • Sex and hormonal factors play a significant role in fear learning and behavior.
  • Further research is needed to translate these findings into effective treatments for fear-related disorders, particularly in women.