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The non‐crossing of the pyramidal tract in procavia capensis (storr) and other instances of absence of the pyramidal crossing
Author(s) -
Verhaart W. J. C.
Publication year - 1967
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901310308
Subject(s) - pyramidal tracts , anatomy , biology , pyramidal cell , medulla , spinal cord , neuroscience , hippocampal formation
In Procavia capensis the pyramidal tract descends uncrossed in the ventral funiculus of the cord, in which it can be followed throughout, the thoracic and lumbar segments. Termination of it fibers is almost entirely crossed similar to mammals with a substantial pyramidal corssing. Other instances of absence of a substantial pyramidal crossing are reported and it is concluded that the pyramidal crossing does not depend only on the termination of the pyramidal fibers in the medulla and the cord, and that the fibers can reach their contralateral endings without such a crossing.