Why estrogens matter for behavior and brain health

Area of Science:

• Behavioral Neuroscience
• Neuroendocrinology
• Sex Differences in Medicine

Background:

• The National Institutes of Health (NIH) now requires addressing sex as a biological variable in all research.
• Previous NIH policies focused on clinical studies, not basic research, limiting understanding of sex-specific physiological and behavioral impacts.
• Sex differences in brain and behavior are well-documented, with sex hormones like estrogens playing a key regulatory role.

Purpose of the Study:

• To review current research on how estrogens influence brain and behavior in adult females.
• To highlight the importance of considering sex as a biological variable in neuroscience.
• To frame an understanding of why estrogens are critical to behavioral neuroscience.

Main Methods:

• Review of findings from the authors' laboratories and other published research.
• Analysis of studies across the adult lifespan.
• Examination of topics including social behavior, learning, memory, and disease risk.

Main Results:

• Estrogens demonstrably influence various aspects of brain function and behavior in adult females.
• Sex differences in physiology and behavior are influenced by hormones, particularly estrogens.
• Research indicates the relevance of estrogen's effects on behavior throughout the adult lifespan.

Conclusions:

• Estrogens are a critical factor in understanding female brain and behavior.
• The NIH's new policy underscores the importance of studying sex as a biological variable.
• Further research into estrogen's role is essential for advancing behavioral neuroscience and sex-specific medicine.