PERREAULT Magazine FEB | MAR 2015 | Page 94

Females vs Males – Are our brains different?

We have all been a victim of common gender stereotypes. How many times have you heard phrases like: “men are rational and women are emotional”. We have all fallen into this stereotypical cognitive bias which is so common , that it is hard to overcome it. The key question is: Do female and male brains differ? And if they do, does it affect the way we process information and make decisions?

Male and Female brains:

A closer look.

At first sight male and female brains are very similar. Using the naked eye,one can even say they are identical. However, when we take a closer look at the anatomy of the brain, some subtle differences can be seen. For instance the gyri, which are the ridges you can clearly see when you look at a brain, differ in both genders. Females have greater gyrification in the frontal and parietal lobes, which gives them an increased cortical surface as compared to men.

The frontal cortex is an area responsible for much of the decisions we make every day. The limbic system which is responsible for the control of our emotions and mediates some types of learning also has anatomical differences. One of the main players of the limbic system is the amygdala, the area where emotions are actually generated and also is responsible for the memory of those emotions. Interestingly and against the popular belief that women are more emotional, in males this region of the brain is larger than in women’s brains! Makes you wonder who the emotional ones are in the end.

Another interesting difference in the brains of men and women, is that men have nearly 6.5 times more gray matter than females do ,and that females have about 10 times more white matter than males do. This hints that throughout evolution we have created almost two different set of brains that are equally intelligent ,suggesting that we use different pathways to obtain a similar result.

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by Dr. German Garcia-Fresco

Neuroscientist

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