What is harmful breath-holding and how they affect our body? Here I want to digress a bit and tell you something about how to arrange and work our brains. The brain consists of two unequal and different in composition parts: the cerebrum and the bark of a large brain. Big brain takes 4 / 5 of total brain, consists of two hemispheres and is constructed primarily of white matter. If you have additional questions, you may want to visit source. Top of this big brain is covered with a thin layer (2-5 mm) gray matter, which is called the cortex cortex. In general, called the cortex of the brain – the cortex, and the big brain – subcortex. The cerebral cortex – is relatively small in size and young formation that emerged about 60 thousand years ago.
Age and volume subcortex much more, it appeared a few million years ago and its volume exceeds the volume of the cortex of 5-10. Subcortex was formed millions of years ago and the only of its function – to ensure the survival of the organism at any time and in anywhere. All the activities of subcortical (unconscious) is determined by self-preservation instinct, which causes a person to act in accordance with their emotions, instincts and needs. So, the subconscious mind – it edinovlastnye possession of our self-preservation instinct. Here, everything is subordinated to the survival, survival, and once again survive. For this purpose, nature went on to a brilliant solution – put together in our subconscious into one three management functions: control the muscles of the body, control somatic functions (functions of internal organs, hormone system) and mind control through the psychic experiences (emotions).