Visually, you can see more than 200 million bundles of nerve fibers connecting the left and right brains – the brain beams – which are two times larger in women than in men. In particular, the part of the brain connected to the part of the cerebral cortex related to vision and the part related to spatial perception of the surroundings, etc. is larger. In terms of the size and weight of the brain, because the male body is generally larger than that of the female, the male brain is larger. There is no difference between male and female brains at birth, but as the body grows, the size and weight of the male brain gradually exceeds that of the female. However, this has nothing to do with the level of ability, only the difference in ability. Some scientists believe that embryonic tissues are mainly influenced by estrogen in the early stages in the womb, and the situation changes after the gestational age of about 8 weeks, when the sex of the fetus determines the direction of development. In the case of a male, a large amount of androgen is secreted, and the brain is bathed in androgen to form a male brain, while the brain that is not bathed in androgen becomes a female brain. In experiments conducted with adult men and women, the comprehension of the outside world by seeing, hearing, and touching, that is, in experiments testing spatial cognitive ability, yielded better results for men than for women. However, females were better than males in understanding verbal speech. There are many cases where females are several months ahead of males when young children start to learn to speak, which also indicates that females are better at language comprehension. However, in fact, it is known that there are also individuals with better verbal abilities among males and better spatial cognitive abilities among females. These gender differences in ability can be seen in the part related to the cerebral cortex. Sometime, let’s talk about the function of the cerebral cortex!