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This volume is an earnest and dignified effort to set forth the importance of considering the nervous mechanism of the heart when attempting to understand the working of this organ in health or disease. Morison believes that the myogenists have been overenthusiastic in their claims. Not only does the ordinary muscle of the heart show nervous structures, but such specialized areas as the sinu-auricular node, Tawara's node, the bundle of His, and the wall of the coronary arteries are rich in nervous tissue whose function must surely be reckoned with. He is also not convinced that the atrioventricular node and bundle are purely vestigial remains of embryonic tissue; he believes that they have participated in the progressive development of the heart, growing and exercising their own special functions. His study of angina pectoris has led him to the belief that its causes may be various. He refuses to commit himself
The Sensory and Motor Disorders of the Heart. Their Nature and Treatment.. JAMA. 1914;LXIII(9):797. doi:10.1001/jama.1914.02570090083032