MEASUREMENT OF CEREBRAL AND CEREBELLAR SURFACES

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Abstract
The work described in the present article is a sequel to that done by Kraus, Ditto, Davison and Weil1 on the measurement of cerebral and cerebellar surfaces. The total and visible cortical surfaces of man and of various animals having been determined, the problem of the area of various functional regions was attacked. This paper is devoted to an account of the observations for the area containing Betz cells, customarily called the motor area. Henneberg,2 in 1910, measured the cortical surface and determined the areas of specific regions. He divided the cortex according to Brodmann's classification.3 He took the region situated between the precentral and central or rolandic fissures (Ca in fig. 8) with the lower border as the sulcus callosomarginalis and behind the sulcus subcentralis medialis of Brodmann. This area was cut into sections of 1 sq. cm. along the fissures and sulci, and these sections

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