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GROWTH OF THE CEREBRAL CORTEX 229 
brain, which is the same in weight but younger. As shown in 
table 5, in the underfed brains the measurement L.G (the sag- 
ittal diameter) is on the average nearly 2 per cent (about 0.25 
mm. in a brain weighing 1.0 gram) greater.than the standard, 
while, on the other hand, as shown in table 6 a (unpublished), 
in the underfed the cortical thickness at the frontal pole (locality 
I) which was measured almost in the same direction with L.G 
is also greater by 10 per cent (about 0.25 mm. in a brain weighing 
1.0 gram) than the standard for the same brain weight, while the 
cortex at the occipital pole (locality V) is nearly equal to the 
standard in thickness. Considering together the above facts, 
the sagittal length of the central nuclei only, if measured between 
the frontal and occipital poles, would be supposedly about the 
same in both the underfed and the standard brains weighing alike. 
~ On the other hand, the width W.8 is, in the underfed, less by 
nearly 2 per cent (about 0.3 mm. for 1.0 gram brain) than in the 
standard, and the cortical thickness at locality VII, which was 
measured at the side of the cerebrum, is thicker in the underfed 
by nearly 10 per cent (about 0.4 mm. for the both hemispheres in 
a 1.0 gram brain (based on the unpublished table 6b for each 
locality), and therefore the central nuclei in the underfed are less 
in width by about 0.7 mm. (for a 1.0 gram brain) than the stand- 
ard for the same brain weight. In short the central nuclei are 
notably elongated in shape in the underfed brain compared with 
the normal brain of like weight. 
17. A DISCUSSION ON THE THICKNESS OF THE CORTEX IN THE 
UNDERFED 
As described in Chapter 7, the cortical thickness in the 
starved brain is on the average markedly greater than the stand- 
ard for the same brain weight. In the sagittal sections, the local- 
ity I surpasses the standard most, the localities II and III are 
the next, while the localities IV and V are almost equal in thick- 
ness to the standard (these statements are based on the unpub- 
lished table 6a for each locality). This order in which the 
localities surpass the standard in thickness is the same as the 
order in rate of increase in the cortical thickness during the post- 
