On the other hand, the chemical products are in proportion to the number of changes of direction into which this imaginary direct line of motion is broken up, for every concussion which accompanies change of direction throws off energy in the chemical form, doubtless increasing the oxidation and other chemical changes to which all constituents of the organism are by nature destined, and the promotion of which all curative processes must include. But the evidences derived from chemical analogies and chemical facts are by no means the conclusion of the array available. Those ordinarily satisfactory are abundant. These are clinical tests. The peculiarity of this class of evidence of chemical effects consists in removing obstinate local and general manifestations of disease, for which the most potent chemical remedies are commonly employed with far less conclusive success.
Cardiac activity is regulated.
Blood pressure may be lowered reflexly. It may be raised also. Contracts arterial blood vessels. If prolonged, dilatation results. Pulse rate may be lowered.