THE METHOD OF MAKING POST-MORTEM EXAMINATIONS. 



velum interposition and the choroid plexus are now dissected up, the 

 blood contents and the general appearance noted, and the third ventricle 

 examined. Not infrequently small cysts of the choroid are found, which 

 seem to have little or no pathological significance. 



The fourth ventricle is now opened by a longitudinal incision through 

 the vermiform process. Each hemisphere of the cerebellum is divided 

 first into two parts, by an incision through the upper and inner convex 

 border, and then each segment is further divided by incisions in the 

 same direction. 



Thin transverse sections are now made through the cerebral ganglia, 

 commencing in front (Fig. 3). The ganglia are supported, and the sec- 



FIG. 3. METHOD OF OPENING THE BRAIN, SHOWING THE UNFOLDED SEGMENTS OF THE CEREBRCM 

 AND LINES OF TRANSVERSE INCISION OF THE BASAL GANGLIA AND DIRECTIONS OF THE INCISIONS 01 

 THE CEREBELLUM. 



tions caused to fall apart as they are cut, by carrying the fingers of out 

 hand under the brain, and gently lifting the ganglia at points just be- 

 neath where the sections are made. It is important to observe the exact 

 position of any lesion which may be discovered in the cerebral ganglia, 

 their relations to the external and internal capsule and to the caudate 

 and lenticular nuclei. 



Finally, the segments of the cerebrum and cerebellum are folded up 

 together into their original positions, the whole is turned over on to the 

 vertex, and thin sections are made through the medulla. Small clots in 

 the medulla should not be overlooked. 



In case of the discovery of apoplectic clots, areas of softening, etc., 

 either in the hemispheres or in the basal ganglia, after their location and 

 extent are determined, they should be carefully searched for lesions of 



