Principles and illustrations of morbid anatomy : adapted to the elements of M. Andral, and to the Cyclopaedia of practical medicine, being a complete series of coloured lithographic drawings from originals by the author; with descriptions and summary allusions to cases, symptoms, treatment, &c. ... / by J. Hope.

Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Principles and illustrations of morbid anatomy : adapted to the elements of M. Andral, and to the Cyclopaedia of practical medicine, being a complete series of coloured lithographic drawings from originals by the author; with descriptions and summary allusions to cases, symptoms, treatment, &c. ... / by J. Hope. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    that the membrane readily admits of being pealed off bom the pia mater. The vertex and the base are the parts at which these changes are most common, the whole ot the membiane being rarely affected. In connexion with inflammation of the arachnoid, and of its subjacent cellular tissue, which is almost always simultaneously affected, the vessels of the pia mater are found preternaturally injected, an extreme degree of which injection, from a case of phrenitis, is presented by Fig. 237, and a minor degree by Fig. 236. The inflammatory injection in these, as in other inflamed membranes, is attended at first with preternatural dryness, but soon after, with an effusion of serum, either pure or mixed with lymph or with pus. Serum effused into the cavity of the arach- noid, gravitating during dissection to the inferior part, often escapes unnoticed when the dura mater is cut: that effused into the cellular tissue between the arachnoid and pia mater is re- tained, and presents, when turbid, the appearance delineated in Fig. 236 ; viz., accumulating in the interspaces between the con- volutions, it imparts a haziness to their tracts, through which the outlines of the great veins are dimly seen. When the accumu- lation is great, a degree of haziness extends even over the sum- mits of the convolutions, and the convolutions become widely separated and very rounded, as I notice in a recent specimen before me. On puncturing the arachnoid, the fluid, if purely serous, oozes out, though slowly, being somewhat detained by the sub-arachnoid cellular tissue ; but if the fluid contain an inter- mixture of lymph, it has more or less of a gelatinous consistence, and often does not escape till pressure is employed. In propor- tion as the intermixture of lymph is greater, the consistence is more considerable, until it attains such a degree as to consti- tute real false membrane. In this case, the colour is a semi- opaque yellow, or greenish-yellow, the latter of which tints is well seen in Figs. 246 and 247. These tints, particularly the yellow, are more decided, and are attended with greater opacity when the effused matter is of a