Motor Tracts of the Brain
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Diagram to show the relative position of several motor tracts in their course from the cortex to the crus. The section through the convolutions is vertical; that through the internal capsule, I, C, horizontal; that through the crus again vertical. C, N, caudate nucleus; O, H, optic thalamus; L2 and L3, middle and outer part of lenticular nucleus; f, a, l, face, arm, and leg fibers. The words in italic indicate corresponding cortical centers.
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Human Central Nervous SystemSource
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 649
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