A treatise on orthopedic surgery . ups. It is,a test that is easily applied and that is especially useful in theexamination of young children. Obstetrical Paralysis.—Paralysis of the arm due to anteriorpoliomyelitis is infrequent as compared with that of the lowerextremity. This form might be mistaken for obstetrical par-alysis, but the history of the disability and its distributionshould make the diagnosis clear. 630 OBTHOPEDIC SURGEEY. Prognosis.—The death rate varies from 3—15 j^er cent, accord-ing to the character of the disease. The prognosis as to func-tion depends primarily npon the are
A treatise on orthopedic surgery . ups. It is,a test that is easily applied and that is especially useful in theexamination of young children. Obstetrical Paralysis.—Paralysis of the arm due to anteriorpoliomyelitis is infrequent as compared with that of the lowerextremity. This form might be mistaken for obstetrical par-alysis, but the history of the disability and its distributionshould make the diagnosis clear. 630 OBTHOPEDIC SURGEEY. Prognosis.—The death rate varies from 3—15 j^er cent, accord-ing to the character of the disease. The prognosis as to func-tion depends primarily npon the area of the destructive diseaseof the cord, secondarily upon the treatment of the weakened ordisabled part. As has been stated, the extent of the primaryparalysis is very much greater than that which ultimately re-mains when the inflammatory changes about the diseased areain the cord have subsided. The Electrical Test.—During the early stages of the diseasethe degree of final paralysis may be fairly estimated by the Fig. Anterior poliomyelitis. Extreme flexion deformity at the hips, inducing quadru-pedal locomotion. (Gibney.) electrical reaction. Within a week after the initial paralysisthe reaction to the faradic current in the muscles and nerves indirect connection with the diseased area is lessened and is soonlost. If the faradic irritability is retained in the paralyzedmuscles, or if it is merely diminished, recovery may be pre-dicted. The muscles which no longer react to the faradic irri-tation may still be made to contract by the galvanic normal muscles the reaction is greatest at the closing of thenegative pole. In the paralyzed muscles the reaction is slower. DISEASES OF TEE NEBVOUS SYSTEM. 631 it requires stronger stimulation, and th^ contraction is greaterat the closing of the positive pole. This is known as the reac-tion of degeneration. The loss of faradic reaction and thechange in the galvanic reaction indicate that the function ofthe affected
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