A treatise on orthopedic surgery . encephalitis.^ Etiology and Pathology.—Cerebral paralysis may be dividedinto two classes—the congenital and the acquired. The diplegicand paraplegic forms are usually congenital, the hemiplegicform is more often acquired. Congenital Paralysis.—Paralysis of intrauterine origin maybe the result of maldevelopment or injury or a secondary effectof intercurrent disease of the mother. Paralysis caused by in-jury at birth is usually the result of rupture of bloodvessels ofthe meninges due to prolonged labor or to the pressure of instru-ments. ^ American Text-book of
A treatise on orthopedic surgery . encephalitis.^ Etiology and Pathology.—Cerebral paralysis may be dividedinto two classes—the congenital and the acquired. The diplegicand paraplegic forms are usually congenital, the hemiplegicform is more often acquired. Congenital Paralysis.—Paralysis of intrauterine origin maybe the result of maldevelopment or injury or a secondary effectof intercurrent disease of the mother. Paralysis caused by in-jury at birth is usually the result of rupture of bloodvessels ofthe meninges due to prolonged labor or to the pressure of instru-ments. ^ American Text-book of Diseases of Bull. J. Hop. Hosp., June, 1909. 650 DISEASES OF THE NEBVOUS SYSTEM. 651 Acquired Paralysis.—Acquired paralysis may be due to hemor-rhage, embolism, thrombosis, or to disease. Saehs^ presents thefollowing classification of causes and effects: PaEALYSIS of liSTKAUTEKINE OrIGIN. Large cerebral defects—true porencephaly. Hemorrhages of intrauterine origin—softening. Agenesis corticalis. Fig. Congenital cerebral diplegia (idiocy). Paealysis Acqijieed aftee Bieth. 1. Meningeal hemorrhage—very seldom intracerebral. Em-bolism : thrombosis in marantic conditions, and occasionallyfrom syphilitic endoarteritis. Results of these vascular lesions:cysts; softening; atrophy; sclerosis, diffuse and lobar. 2. Chronic meningitis. Paealysis Occueeing duei:ng Laboe. Meningeal hemorrhage—very seldom intracerebral. Pesult- ^ Sachs, jSTervous Diseases of Children. 652 OBTHOPEDIC SUEGEBY. ing conditions : meningoencephalitis chronica ; sclerosis; cysts;atrophies; porencephalies. 3. Hydrocephalus. 4. Primary encephalitis (Strlimpell). General Symptoms Motor.—The effect of the lesion of the hrain and of the secondary changes in the anterior pyramidal Fig. 431.
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