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Then it directs and executes your actions.įinally, it is responsible for the conscious awareness of the mind itself. In addition to this, the brain generates the emotions, perceptions, and thoughts that guide your behavior. Among your brain’s 100 billion neurons, some regulate your breathing, heartbeat, and blood pressure and others control hunger, thirst, sex drive, and sleep cycle. The most basic function of the brain is to keep the rest of the body alive. It is only now that the full wonder of the brain is being realized. René Descartes, the French scientist, gave it a little more respect, concluding that it was a sort of antenna by which the spirit might commune with the body. The Ancient Greek philospher, Aristotle, thought the brain was a radiator for cooling the blood. When they mummified their dead, the ancient Egyptians scooped out the brains and threw them away, yet carefully preserved the heart. SEAT OF CONSCIOUSNESS Given this, it is perhaps not surprising that for centuries the contents of our skulls were regarded as relatively unimportant. If you sliced off the top of someone’s head and peered inside, you wouldn’t see much happening at all. It doesn’t expand and shrink like the lungs, pump like the heart, or secrete visible material like the bladder. As organs go, it is not especially prepossessing-3lb (1.4kg) or so of rounded, corrugated flesh with a consistency somewhere between jelly and cold butter.
Human brain mapping pdf pdf#
The Human Brain Book 2019 PDF Free Download