As we all know, human beings' social activities such as speech, walking, thinking and feeling are realized through the brain. Without the existence of brain, people can not maintain their normal life activities and survival.
The brain is the most advanced part of the nervous system, composed of left and right hemispheres. There are transverse nerve fibers between the two hemispheres.
The human cerebral cortex is the most developed, is the organ of thinking, dominates all the activity process in the body, and regulates the balance between the body and the surrounding environment, so the cerebral cortex is the material basis of advanced neural activities.