But the will, as well as the emotions, may affect the heart. Many cases illustrative of this assertion are on record. The best authenticated case is that of a Colocynthis Townsend, of Baltimore, which was described by Dr. George Cheyne, who was a witness of the fact. The case was that of a gentleman in apparent health, who by an effort of the will could at any time cause an apparent cessation of all the vital functions, so that the heart’s action could not be perceived, nor any respiratory movements be observed.
It is a fact well known to anatomists, that animals possess the power to move and govern certain muscular organs and muscles, while man, possessing the same muscular structures, has no apparent influence on them. How far this influence extends to the heart is a problem which may well attract our attention. We should not overlook this sympathy between the mind and the heart. A full appreciation of it may lead us to form opinions and diagnoses, which could not otherwise be correctly made. A physician may be treating the heart with medicines, when his efforts should be directed to a ‘mind diseased.” We should never lose sight of the psychological relations of the heart, as well as its anatomical, physiological, and pathological history.