. Pathological technique; a practical manual for workers in pathological histology and bacteriology. se cases also the best re-sults are obtained by hardening the brain entire in formal-dehyde, and later making serial sections for macroscopicstudy or for carrying through for histological purposes. Inmany cases, however, it is necessary or advisable to examinethe lesions in the fresh state. For instance, if it be desiredto study the neuroglia-fibers, it is positively necessary to cutout thin slices of fresh tissue and to fix them immediately in 5i2 PA THOL O GICAL TE CHNIQ UE. the proper soluti
. Pathological technique; a practical manual for workers in pathological histology and bacteriology. se cases also the best re-sults are obtained by hardening the brain entire in formal-dehyde, and later making serial sections for macroscopicstudy or for carrying through for histological purposes. Inmany cases, however, it is necessary or advisable to examinethe lesions in the fresh state. For instance, if it be desiredto study the neuroglia-fibers, it is positively necessary to cutout thin slices of fresh tissue and to fix them immediately in 5i2 PA THOL O GICAL TE CHNIQ UE. the proper solution. Often, too, the lesion cannot be or isnot found except on fresh examination, or the clinician whosecase it is desires to see at once the cause of certain symp-toms. Under such circumstances the more ideal methodmust be sacrificed, and as much made out of the case as ispossible in the condition in which it is left after the exami-nation. For the routine examination of the brain, to demonstrate G. front. call marg. J G. front. II. G. front. III. G. centr. centr. 4>.. interpar. .par. sup. par. 162.—First cut in the brain (Nauwerck). its topography and to bring to light suspected or unsus-pected lesions, probably no method is more generally usedthan Virchows. The objection most often made against itis that the cerebral cortex is too much cut up. In case,however, it is desired to preserve the cortex or parts of it formicroscopic purposes, the longitudinal incisions after the firstmay be omitted, and the cortical portion, after being sepa-rated from the stem, may be cut in any way that seems ad-visable. In like manner, the brain-stem or any other part POST-MORTEM EXAMINATIONS. 513 may be left uncut, and hardened entire in formaldehyde forhistological purposes. Virchows Method.—The brain is to be placed on its basein the same position as ones own. Press the hemispheresapart a little so as to expose the corpus callosum. H
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