Brain; A Journal of Neurology Volume 7

Brain; A Journal of Neurology Volume 7

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ...introduced from tho meninges. Not the least pathological significance can bo attached to them. Forms of pathological pigment on the cerebral vessels. We have just seen that pigment is normally found on the brain-vessels under two forms. There are deposits of pigment which can only be regarded as pathological, and particularly 1. Blood-colouring matter, Haematoidin.--This is seen as diffuse colouring matter of round granulated cells (fat-granule cells, or lymph-corpuscles), or in the form of larger or smaller red-brown bright granules; not uncommonly we find hnamatoidin crystals in the shape of rhombic columns. Such crystals or amorphous granules are frequently seen in the interior of the fat-granule cells. In isolated vessels we find the blood-colouring matter either applied to the adventitia or situated in its lymph-spaces; in cut sections we see that also the surrounding nerve tissue is nearly always richly pervaded with this pigment, namely with cells containing pigment. The presence of a large quantity of this pigment is always a sign that, in this place, an exsudation of blood has occurred. The formation of haomatoidin crystals as well as the diffuse yellow-coloured cells is easily recognisable; on the contrary, the granule-forms cannot be distinguished from normal pigment without further investigation. We possess a reaction which permits us, even after hardening in the chromatc salts, to make out this difference without a doubt. The blood-colouriug matter, under the influence of concentrated sulphuric acid, passes through a series of colours, viz. green, blue, and violet, and is finally discharged. Normal pigment hardly changes at all when thus treated. 2. Malarial Pigment.--In people who have suffered from attacks of intermittent...show more

Product details

  • Paperback | 208 pages
  • 189 x 246 x 11mm | 381g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236568168
  • 9781236568168