The Brain

The book I read to research this post was The Brain A Very Short Introduction by Michael O'Shea which is an excellent book which I bought from kindle. Even in primitive times people knew that the brain was the human control centre. We can see this by the number of attempted operations like drilling the skull to let demons out when in fact someone was maybe mentally ill. Interestingly people often survived this kind of operation. Leonardo da Vinci studied the human brain and often dissected them. He knew the eye had a kind of onion type structure, He also made wax mouldings of different parts of the brain. The brain is the most complex structure known to man & typically has 100 trillion connections between the brain cells. In 1963 someone won a nobel prize for discovering that the brain uses potassium & sodium ions to conduct electricity. The axons themselves are very poor conductors.