Organic and functional nervous diseases; a text-book of neurology . ercular menin-gitis the pia on the base alone may be the portion inflamed, hence thisform has been named basilar meningitis. In syphilitic meningitis the 713 714 CEBEBRAL MENINGITIS. pia on the base near the posterior perforated space and about the cruscerebri or at the sides of the medulla and pons is usually aifected. Itis evident that this difference in location will cause a great differencein the symptoms of the various types. Pathology.—After a short period of hypersemia the congested piabecomes covered with an exudation
Organic and functional nervous diseases; a text-book of neurology . ercular menin-gitis the pia on the base alone may be the portion inflamed, hence thisform has been named basilar meningitis. In syphilitic meningitis the 713 714 CEBEBRAL MENINGITIS. pia on the base near the posterior perforated space and about the cruscerebri or at the sides of the medulla and pons is usually aifected. Itis evident that this difference in location will cause a great differencein the symptoms of the various types. Pathology.—After a short period of hypersemia the congested piabecomes covered with an exudation of serum, lymph, fibrin, and serum infiltrates its meshes and collects between the pia and thebrain, making the latter oedematous. It also collects below the arach-noid, lifting this so that it appears to contain cysts. The fibrin is de-posited in flakes on and in the pia, rendering it less transparent thannormal and covering it and the brain with a thick opaque lymph. Thepus is infiltrated through the meshes of the pia, and as it increases in Fig. Acute meningitis of the convexity of the brain. The thickening of the pia, its infiltration with theproducts of inflammation, and the invasion of the cortex by cells is seen. amount fills up the space between the convolutions along the lineswhere the pia dips down, then it collects in the sulci, and finally mayform masses of a yellowish-green color, covering the surface and fillingup its irregular spaces. The cortex of the brain on which this serousand purulent exudation lies soon becomes affected; in fact, in everycase one has to deal rather with a meningo-encephalitis than with asimple meningitis. The cortex is greatly congested. Wherever thepial vessels dip into the cortex, serum, lymph, and pus are exuded,and small hemorrhages and little collections of pus are found every-where in the cortical layers. Occasionally large areas of softening orlittle abscesses are found in the brain. The pia covering the cerebel-lum
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnervoussystem, bookye
