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Sex Differences in the Brain: Why using sex-related factors rather than sex itself generates more precise data

February 18, 2025

Author:

Allison Swelin

A recent article in the Transmitter examines the evolving understanding of sex and gender differences in neuroscience. Historically, neuroscience research has predominantly focused on male subjects, but mounting evidence suggests this approach may miss crucial insights about brain function and disease.

While male and female brains share similar overall structure, research indicates important differences in brain activity, function, and underlying molecular and cellular mechanisms. These findings underscore the need for more comprehensive research approaches that consider both sexes.

As Marija Kundakovic, professor of biological sciences at Fordham University, notes: “Simply including females in research studies is insufficient to resolve the role of sex and gender in neuroscience.” She advocates for a more nuanced approach: “If a study cannot include or control for sex-related variables, such as ovarian hormone status, we should include females and males and perform an analysis that includes sex as a factor. If there are no sex differences, we should ask ourselves whether the difference may be hidden. If there is a difference, it would be important to search for a sex-related factor that can provide a mechanistic insight and possibly reveal novel drug targets across genders.”"

Recent technological advances are making it more feasible to study sex-based differences in neuroscience, helping researchers move beyond the traditional male-centric model. This evolution in research methodology promises to deepen our understanding of brain function and potentially lead to more effective treatments for neurological conditions across all populations.

For more information on this topic, read the full article: Revisiting Sex and Gender in the Brain in the Transmitter.