TRACTS OF FIBRES MKDULLATED IN BABY'S BRAIN 



I'-LORENCE R. SABIN 



PLATE 2 



Fig. 1 Mesial view of the entire model showing the tracts that are meduUated 

 at birth as far as they can be seen from the mesial plane. 2J^X. This view shows 

 especially the fasciculus longitudinalis medialis, the lemniscus medialis in the 

 brain stem, and the anterior and medial nuclei of the thalamus. For the meaning 

 of the numbers see key to numerals. An outline of the cortex of the anterior 

 and posterior central convolutions is given for orientation. Tlie bundles of 

 medullated fibres have a blue tone. 



Fig. 2 Mesial view of a baby's brain given to orient figs. 1, 3, and 4. The brain 

 is older than the one from which the models were made. 



THE AMEKICAN JOURNAT- OF ANATOMY, VOL. 11, NO. 2. 



