Seven months later the phenomena had all disappeared except for slight tic-like frontalis contractions.
Re heredity and soil, Mairet investigated 22 cases of Shell-shock, and found a hereditary taint in eight, and an acquired predisposition in nine. He found hereditary taint definitely absent in seven, and acquired soil definitely absent in six; whereas the rest of the cases were doubtful. He found both the taint and the soil in five cases; two cases with hereditary taint alone; no case acquired, non-hereditary.
In eight cases with head trauma, Mairet found three with hereditary taint, four without such; against one with an acquired predisposition, four without such, others doubtful.
Re cases of somatic trauma (not affecting the head), among five examined, there were none with hereditary taint, three definitely without taint, and five definitely without predisposition. According to Babinski, neither hereditary taint nor prepared terrain needs be found in hysterics.
A predisposition is not thought important by Oppenheim, especially as so many normal persons are predisposed.
War strain (fatigue, emotion): Hysterical hemiplegia. Precisely similar hemiplegia ANTEBELLUM.
Case 291. (Roussy and Lhermitte, 1917.)
A sergeant in a regiment of cuirassiers was observed at Villejuif, January 25, 1915. He had lost power on the left side as a result of fatigue and emotion, November, 1914. He had a complete paralysis of the left arm and a paresis of the left leg. There was an anesthesia of hysterical type in the left arm, and also of the left leg as far as the middle of the thigh. He dragged his leg in walking (démarche en draguant: the toe is dragged along the ground, the trunk is bent forward, and at every step plunges somewhat toward the paralyzed side. The patient is able to walk, however, by means of a cane or crutches. This walk is characteristic of hysterical hemiplegia. According to Roussy and Lhermitte, the number of cases of hysterical hemiplegia (better, hemiparesis) is not large). The plantar reflexes on both sides were those of flexion. Upon treatment (not specified), at the end of six months he went back to service in the cavalry.
The point of note in this case is that this patient had had a precisely similar phenomenon on the same side, which lasted a month, at the age of sixteen years and a half. It is noteworthy that in this case there was no traumatism and only the factors of fatigue and emotion to serve as an occasion for the hemiplegia. In fact, hysterical hemiplegia is said very rarely to follow physical trauma to an extremity. There are, however, some cases in which hemiparesis follows a slight head wound, particularly if over the region controlling the paralyzed limbs.