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. Top of this big brain is covered with a thin layer (2-5 mm) gray matter, which is called the cortex cortex. Ray Kurzweil shines more light on the discussion. 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. More info: Ray Kurzweil. 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).