Books author - "William Henry Pyle"
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an and ends in a muscle. This statement represents the general scheme well enough, but leaves out an important detail. The nerve does not extend directly to a muscle, but ordinarily goes by way of the brain. The brain is merely a great group of nerve cells and fibers which have developed as a central organ where a stimulation may pass from almost any sense organ to almost any muscle.But another importance attaches to the brain. When a sense organ is stimulated and this stimulation passes on to