73 Brit. Med. Journ., 1869, pp. 378, 483.
Among the 430 hysterical cases of Briquet, only 120 were attacked with paralysis. In 370 cases of Landouzy were 40 cases of paralysis.
Briquet reports 6 cases in which paralysis attacked the principal muscles of the body and of the four extremities; 46 cases of paralysis of the left side of the body, and 14 of the right; 5 of the upper limbs only; 7 of the left upper limb, and 2 of the right; 18 of the left lower limb, and 4 of the right; 2 of the feet and hands only; 6 of the face; 3 of the larynx; and 2 of the diaphragm. Landouzy gathered from several authors the following results: General paralysis in 3 cases; hemiplegia in 14; 8 cases of paralysis of the left side; in other cases the side affected not indicated; and 9 cases of paraplegia.
Hysterical paralyses, no matter what the type, may come on in various ways—suddenly, gradually, from moral causes or emotional excitement, or from purely physical causes, as over-fatigue. They may have almost any duration, from hours or days to months or years, or even to a lifetime. They are frequently accompanied by convulsive or emotional seizures. They may be of any degree of severity, from the merest suspicion of paresis to the most profound loss of power. Hysterically paralyzed muscles retain their electro-contractility. Limbs which have become atrophied from disuse may show a temporary lessening of response, but this is quantitative and soon disappears. In rare cases, owing probably to the condition of the skin, the response to electricity is not obtained until the current has been applied for several minutes to the muscles.
Hysterical hemiplegia and monoplegia may simulate almost any type of organic paralysis. The paralysis is usually in a case of hemiplegia, confined to the arm and leg, the face being slightly, if at all, implicated. Hysterical paralysis, limited to the muscles supplied by the facial nerve, is very rare. According to Rosenthal, it sometimes coexists with paralysis of the limbs of the same side, and is usually accompanied by anæsthesia of the skin and special senses. In a few rare cases, according to Mitchell, the neck is affected.
Several cases of hysterical double ptosis have come under my observation. The condition is usually one of paresis rather than paralysis. Cases of unilateral ptosis hysterical in character have also been reported. Alternating squints are sometimes hysterical, but they are usually of spasmodic rather than of paralytic origin.
Hysterical hemi-palsy is more frequent on the left than in the right side. In Mitchell's cases the proportion was four left to one right. The figures of Briquet have been given. It is usually, but not always, accompanied by diminished or abolished sensibility, both muscular and cutaneous. Electro-sensibility especially is markedly lessened in most cases.
When hemiplegia is of the alternating variety, the arm on one side and the leg on the other, or, what is rare in paralysis of organic causation, both upper extremities and one lower, or both lower and one upper, may be affected. Alternating hemiplegia of the organic type is usually a paralysis in which one side of the face and the leg and arm of the opposite side are involved.
Hysterical paraplegia is one of the most important forms of hysterical paralysis, and is sometimes the most difficult of diagnosis. It occurs usually, but not exclusively, in women. It comes on, particularly in young women, between puberty and the climacteric period, commonly between the twentieth and thirtieth years. Such a patient is found in bed almost helpless, possibly able to move from side to side, but even by the strongest efforts seemingly incapable of flexing or extending the leg or thigh or of performing any general movements of the foot. The feet are probably in the equino-varus position—extended and turned inward. Certain negative features are present. The muscles do not waste to any appreciable extent, as they would in organic paralysis. Testing the knee-jerk, it is found retained, possibly even exaggerated. The electrical current causes the muscles to contract almost as well as under normal conditions; if a difference is present, it is quantitative and not qualitative in character. Paralysis of the bowels and bladder is not usually found, although it is but fair to state that this appears not to be the conclusion arrived at by some other observers.
Paralysis or paresis of the vocal cords, with resulting aphonia, is a common hysterical affection. Hysterical aphonia is also due to other conditions—for instance, to an ataxia or want of co-ordinating power in the muscles concerned in phonation; or to spasm, real or imaginary, in the same parts. Hysterical paralysis of the vocal cords is almost invariably bilateral; viewed with the laryngoscope, the cords are seen not to come together well, if at all. One may be more active than the other; but a distinct one-sided paralysis of this region nine times out of ten indicates that the case is not hysterical.