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Proceedings of the Royal Society of Edinburgh. [Sess. 
lateral and direct anterior ; below this there are only two. There is no 
evidence of any direct ventro-lateral pyramidal tract like that described 
by Barnes in the human subject, and nothing corresponding to Pick’s bundle 
is to be seen. 
In the 1st cervical segment of the spinal cord (fig. 8) the crossed 
pyramidal tract occupies an extensive area in the posterior part of the 
lateral column. It lies in front of, and in contact with, the substantia 
gelatinosa of Rolando, extending from the grey matter to the periphery 
of the cord. A few scattered degenerated fibres are seen in the dorsal 
Fig. 8. — First cervical segment of 
spinal cord. 
Fig. 10. — Seventh cervical. 
Fig. 11. — First thoracic. 
cerebellar tract, which is at this level beginning to separate itself from 
the ventral cerebellar tract and to enter into the formation of the restiform 
body. The fibres are arranged in small bundles close to the grey matter, 
but elsewhere they are uniformly scattered over the whole area, and 
cannot be said to be more numerous at one part than at another, except 
anteriorly, where the degeneration shades off into the white matter. 
In the 5th cervical segment (fig. 9) the position and area occupied by 
the degeneration is practically the same as in the first cervical segment. 
The dorsal cerebellar tract extends farther forwards along the margin 
of the lateral column, and comes in between the periphery of the cord and 
the area of degeneration in its posterior half, but in front of this the 
degeneration reaches quite to the margin of the lateral column. 
