Nervous and mental diseases . cc or lu the tliickuess 01 the clura matcr,and outward iniooking to the right. ^^ dccply withiu the braiu, OU somc Septal infolding or penetrating blood-vessel. Theycomport themselves as do brain-tumors generally, and give rise to similarlocalizing signs and symptoms. Sclerous or fibrous degeneration marksthe later stages of all these specific neoplastic lesions, and gives rise towhat is sometimes called sclerous syphilitic meningitis. Syphilitic cerebritis may exist as a direct extension from a specificmeningitis or gumma, or may occur more or less independently.
Nervous and mental diseases . cc or lu the tliickuess 01 the clura matcr,and outward iniooking to the right. ^^ dccply withiu the braiu, OU somc Septal infolding or penetrating blood-vessel. Theycomport themselves as do brain-tumors generally, and give rise to similarlocalizing signs and symptoms. Sclerous or fibrous degeneration marksthe later stages of all these specific neoplastic lesions, and gives rise towhat is sometimes called sclerous syphilitic meningitis. Syphilitic cerebritis may exist as a direct extension from a specificmeningitis or gumma, or may occur more or less independently. It maypresent itself as a diffuse, gummatous encephalitis, or as localized en-cephalic gummata which tend to caseate, or it may appear in circum-scribed patches or plaques, especially in the pontine and peduncularsurfaces, which may end in sclerous patches. Every syphilitic processin the brain entails a surrounding zone of cerebral softening or cerebritis. Syphilitic Cerebral Arteritis.—Syphilitic endarteritis in the braiu. SYPHILIS OF THE XERVOUS SYSTEM. 493 is a comparatively common accident. It may result in the oblitera-tion of the large basilar vessels secondarily to a gummatous menin-gitis, or it may develop as a primary focus of syphilitic activity. Itslegitimate result is a localized ischemia, which, if complete, results inthrombotic brain-softening. Heubner insists upon its frequency in thebasal ganglia. The middle cerebral arteries are frequently affectedeither in the numerous small branches of the Sylvian or by the completeobliteration of this motor-zone vessel. It is also established that cerebral hemorrhages may follo^Y a specificarteritis. This rarely occurs within the brain-substance, but more oftentakes place in the large and comparatively unsupported basilar vessels,resulting in a foudroyant apoplectic stroke almost immediately fatal. Syphilitic Lesions of the Cranial Nerves.—Owing to theirexposed position at the base, where specific cerebral invasion is m
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Keywords: ., bookcentury1900, booksubjectmentalillness, booksubjectnervoussys
