ABSTRACT
The mass of grey matter designated by the name of corpus striatum is the complement of the optic thalamus, with which it constitutes those two grey ganglions which occupy the central region of each hemisphere, and which are, as has been frequently pointed out, the natural poles around which all the nervous elements gravitate. The colour of the grey matter of the corpus striatum is sensibly homogeneous, wherever it is observed. It is flabby, reddish, and composed of special anatomical elements. The grey matter of the corpus striatum is histologically composed of an infinite number of large polygonal nerve-cells with multiple prolongations, their size being in general about the same as that of the larger cells of the cerebral cortex. The elements of the corpus striatum, on the contrary, have an inverse influence upon the stimuli starting from these same regions of the cortical substance.
