Women often manage less well to completely relax to forget all the worries of everyday life. and for good reason, the female brain would have a lower capacity to rest than men. a difference that might find its source in the levels of sex hormones. In the image of an internet network where, whatever the hour, internet users are always connected, our brain is never completely at rest.
Even when not thinking of anything, especially a neural circuit, the default network is still active. it is this network that activates when we begin to daydream, but for more important tasks, it is the executive network that activates that allows to solve complex cognitive problems. In patients with psychiatric disorders such depression, Alzheimer’s disease or schizophrenia, the default network is known to be disturbed. to better understand these differences, the brains of men and women and schizophrenics healthy volunteers were analyzed using functional magnetic resonance imaging (fMRI) based on the observation of oxygenation of certain zones by blood.
The images of brain areas activated were obtained while performing tasks requiring concentration (mental rotation of a three-dimensional figure) or between two years (rest). the researchers expected to obtain significant differences between schizophrenics and healthy people. This is what was observed but as a bonus, the team uncovered a difference in brain function between man and woman.
Blame the default network Regarding the healthy people, the parietal cortex and lateral prefrontal (which belong to the default network) are better irrigated and thus significantly activated in men when the job rotation, but not in women. at rest, the default network is more active hand in women than in men. These results indicate that the female brain has a lower ability to rest, as if women were always thinking that they had just or that they were going to do later, when the men in them seem further away from these concerns. increased brain activity in women rest might explain their ability to perform several tasks simultaneously and be more introspective, says Adrianna Mendrek, who led the study published in the journal schizophrenia research.
Testosterone, the difference key Cerebral gender? Surprisingly, this finding is the opposite of the one highlighted in schizophrenic subjects. the brain activity of sick women is more like that of healthy men, and vice versa. Moreover, while men generally succeed better than women three-dimensional mental tasks, schizophrenic women performed better than their male associates.
The extent of male hormone (testosterone) could perhaps explain phenomenon. Women with schizophrenia have higher testosterone levels than healthy women and men schizophrenic conversely a lower rate than healthy men.These measures have shown a correlation between brain activity and testosterone, but allow to assert the existence of a causal link. Moreover, the differences in question remain low and are not identified in all states schizophrenia Adrianna Mendrek. further work must therefore complete these results.