There is no organ or portion of viscera which is not intimately connected with the brain through the sympathetic nervous system.
We know that cell metamorphosis is interfered with by excessive irritation; that cell nutrition is hindered thereby, and, as a result, the function of the cell lessened.
When we consider the function of brain cells, and especially of that portion where we expect mentality to be located, the importance of perfect physiologic conditions is manifest to insure perfect pyschologic action. We know that in the brain certain associations of cells called centers have control or inhibitory influence over many of the lower reflex functions when in perfect healthy action. Hence, if these lower reflex functions are badly disturbed or interfered with by disease or accident, may we not expect defects in those functions of the brain above mentioned, sufficient to cause a loss of self-control, and, in