Brain images show menstrual cycle rhythms

Oct 24, 2005

Cornell University scientists say women with no menstrual mood changes may use parts of their brains differently over the course of their menstrual cycles.

Emily Stern of Cornell's Weill Medical College and colleagues studied 12 women chosen for their consistently steady moods.

During the brain imaging experiment, the women saw printed words with either negative, neutral or positive connotations and performed behavioral tasks while the researchers recorded blood oxygen patterns in their brains, which corresponds to increased brain region usage.

The women were tested 1-5 days before menses onset and 8-12 days after menses onset. Premenstrual patterns showed greater activity in frontal brain regions that help control emotions. A reciprocal pattern was seen postmenstrually.

Since the changes weren't reflected in the women's outward emotional states, the researchers speculate the greater allocation of the brain's resources may allow the women to compensate for hormonal changes and maintain a consistent emotional state.

The scientists say the results provide a foundation for studying premenstrual mood disorders and demonstrate brain processes can change across the menstrual cycle.

The study appears in the online early edition of the Proceedings of the National Academy of Sciences.

Copyright 2005 by United Press International

Explore further: Everglades trail surveyed for cultural artifacts

add to favorites email to friend print save as pdf

Related Stories

Study: Stress hormone blocks testosterone's effects

Sep 29, 2010

High levels of the stress hormone cortisol play a critical role in blocking testosterone's influence on competition and domination, according to new psychology research at The University of Texas at Austin.

Recommended for you

Secrets of dinosaur ecology found in fragile amber

11 hours ago

Ryan McKellar's research sounds like it was plucked from Jurassic Park: he studies pieces of amber found buried with dinosaur skeletons. But rather than re-creating dinosaurs, McKellar uses the tiny pieces ...

User comments : 0