Tissue destruction or nerve irritation by chemical poisons.
Reflex motor disturbances which further limit digestive power.
Or
Abnormal mental condition.
Waste of nerve energy with production of toxins.
General metabolic disturbance.
Increased disease wherever disease previously existed.
These are offered merely as illustrations. There are many accessory chains which aid in the production or development of disease and act as secondary causes.
Concussion of Forces
Man was so created, so provided with means for repair, growth, etc., that the body tends to maintain its own functional balance—perfect harmony among all its parts—unless interfered with by some outside agency. There are certain natural laws such as the law of gravitation and the law of momentum and inertia which operate without regard for man or man’s welfare. If man, wittingly or unwittingly, allows himself to come into violent conflict with one of these laws by falling to the ground or in meeting sudden and unexpected opposing force or mass while in motion, that which may be termed a concussion is produced by the meeting of the outside force and the internal bodily resistance.