Image from page 310 of "Post-mortem pathology; a manual of post-mortem examinations and the interpretations to be drawn therefrom; a practical treatise for students and practitioners" (1905)
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llaries and these rarely become inflamed. In the examination of the outer surface of the dura mater (Fig.129) note alterations in color and gloss. The latter is often lost inconsequence of tumors, hemorrhage, hydrops, abscess, and other con-ditions that cause increase of intracranial pressure. Search for hemor-rhages (which at times are profuse and depress the brain) and theirpoints of origin, Pacchionian bodies (which must not be mistaken fortubercles), bulging tumors, and external pachymeningitis (ossified,purulent, syphilitic, or tuberculous), etc. The degree of tension dueto fluid, etc., may be determined by puncturing or by pinching up thedura. The brain may be exposed, but not dissected, before the heart isincised, as the quantity of blood in the cerebrum may be modified byvenous oozing during the examination of the thorax. If the brainis to be injected, it is best not to remove the dura, as by its detachmentusually some of the veins entering the longitudinal sinus are torn, and
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FlG. i.;o. — Appearance of the brain after removal of the dura, which has been left attached at itsposterior extremity.
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