AN IMPROVED METHOD OF MODELING ESPECIALLY 



ADAPTED FOR THE CENTRAL 



NERVOUS SYSTEM. 



[From the Anatomical Laboratory, Pliilippine Medical School, Manila, P. I. 



PREPARATION OF BRAIN JIODELS. 

 By Maeia Paz Mendoza and Manuel Ramirez. 



During the last summer session of the Philippine Medical School, 

 Dr. Bean recommended to us the study of the nervous system and sug- 

 gested that in the dissection of the brain we make at least three different 

 sections, sagittal, coronal (frontal), and horizontal, and take an exact 

 copy of the two surfaces of each section on pieces of blotting paper,^ cut 

 out the ventricles and paste each two, which complete one section, 

 together by means of small cubes of wood cut in such a way that the 

 resulting thickness is just the same as that of the original section. 

 Tlie idea was to show the shape, size and relative position of the brain 

 ventricles through the gaps left by the jjieces of blotting paj)er j^asted on 

 the blocks, and on the blotting paper to show the internal structure of 

 the brain. We adopted the suggestion and tliought it cajDable of further 

 improvement by suljstituting for the blocks of wood blotting-paper pulp, 

 thus also gaining the external morphology and converting the work into 

 true modeling. We found this to be an easy, economic, interesting and 

 accurate work, the success of which is shown by the photographs 

 accompanying this description. 



PROCESS. 



1. Materials : Blotting paper, white and onion sl'cin paper, guni arabic and 

 paints. 



2. Procedure: Preparation of sections. 



For coronal sections, an entire brain was taken from the preserving 

 fluid,^ held on a mass of cotton and ten sections of equal thickness made 

 with a brain knife. 



Sagittal and horizontal sections. ^-T\\e brain is first divided into 



' Sussana Plielps Gage : The Metliod of Making Models from Sheets of Blotting 

 Paper. The Anatomical Record. (1907), 7, 166. 



- Miiller's fluid was employed so that the same material conld be used for work 

 on the histology of the brain. 



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