During the War many an able soldier suffered from "shell shock." After hours of bombardment men would become madly hysterical. Exploding shells would throw men through the air or bury them under debris. Afterwards, many with no outward sign of injury would be paralyzed or gibbering. The mystifying aspect of "shell shock" was that the functional disturbance was often in a part of the body far from the obvious injury. Pathologists eventually found that the nerves governing the disturbed part usually were subtly distorted. Recovery from shell shock was slow. Many a case still persists, 13 years after the War's end.
Nonetheless...