. Pathological technique; a practical manual for workers in pathological histology and bacteriology. t in the left hand and making vertical straight sectionsfrom the upper angle of the previous cut into the convexcortex, allowing the sections to fall apart, so as to avoidtouching and soiling the surface with knife or fingers. Eachportion thus cut represents a prism. The incisions shouldgo well into the cortex, but not so far as to separate thedifferent pieces. The basal ganglia are examined by meansof a number of frontal sections. For this purpose the lefthand is placed palm upward underneath
. Pathological technique; a practical manual for workers in pathological histology and bacteriology. t in the left hand and making vertical straight sectionsfrom the upper angle of the previous cut into the convexcortex, allowing the sections to fall apart, so as to avoidtouching and soiling the surface with knife or fingers. Eachportion thus cut represents a prism. The incisions shouldgo well into the cortex, but not so far as to separate thedifferent pieces. The basal ganglia are examined by meansof a number of frontal sections. For this purpose the lefthand is placed palm upward underneath the brain, so that as 5*4 PATH0L0G1CAL TECHNIQUE. each section is made over the tips of the fingers by one longstroke of the knife it falls forward, exposing a clean surfaceof which the two halves can be compared. An incision isnext carried through the middle of the pineal gland, thecorpora quadrigemina, and the vermiform process of thecerebellum, opening the aqueduct of Sylvius and the fourthventricle. Each half of the cerebellum is divided by a median hori- Corp. striat. Corp. desc Cr. forn. 163.—Section of the brain (Nauwerck). zontal section into halves, and these portions are still furthersubdivided by a series of cuts radiating from the peduncles. In order to make sections of the pons and medulla thebrain is folded together and turned over. Several cross-sections are then made with the left hand placed beneath asin sectioning the basal ganglia. Before making the sections it is well to remove the basilarand vertebral arteries, especially if they are calcified. In Pitres method of dissecting the brain the lateral ven-tricles are opened as in Virchows method. Then the pedun-culi cerebri are cut squarely across, so as to remove the pons POST-MORTEM EXAMINATIONS. 515 and cerebellum, and a longitudinal incision is carried downthrough the third ventricle, halving the cerebrum. Througheach half of the cerebrum a series of six sections is the
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Keywords: ., bookcentury1900, bookdecade1910, bookidpath, booksubjectpathology
