. A treatise on mental diseases. ch and lateralbuds swelling up, as it were, to meet the termination of the supposes an even more active movement of the cell and den-drite, which shows itself not only in the altered form, but in thefiner protoplasmic structure of the cell. Cajal has built upon thevascular neuroglia cells a different hypothesis, seeing in them con-tractile elements that expand the blood-vessel and induce conges-tion of the cortical substance, and, in consequence, closer union ofthe intrinsic elements —a theory entirely inconsistent with the truefunction of the neuro
. A treatise on mental diseases. ch and lateralbuds swelling up, as it were, to meet the termination of the supposes an even more active movement of the cell and den-drite, which shows itself not only in the altered form, but in thefiner protoplasmic structure of the cell. Cajal has built upon thevascular neuroglia cells a different hypothesis, seeing in them con-tractile elements that expand the blood-vessel and induce conges-tion of the cortical substance, and, in consequence, closer union ofthe intrinsic elements —a theory entirely inconsistent with the truefunction of the neuroglia bodies. It is doubtful, indeed, if themanner in which the nerve impulse passes over from terminalapparatus to dendritic branch will ever be fully understood. Letit suffice at present that we possess the definite knowledge thatnerve-entd apparatus and protoplasm of cell are in fixed positionsas regards one another, and that in some unknown way the impulse,in whatever form it assumes, passes from one to the other. PLATE III. Py. S. PJ. S PLATE III Diagram of the Nerve Elements of the Cortex To the left the nerve cells and their connections are seen as defined by theGolgi method. In the middle the density and course of the fibres, with particularreference to the tangential bands at the different cellular levels, are shown; to theright, the forms and sizes of the nerve elements with their average measurementsaccording to Hammarberg. 1. Py., Py., Py., Py., pyramidal cells of the several layers that distinctly belongto this type of cell. All have descending axones, with collaterals either distributedtangentially or ascending among the dendritic ramifications of the cells and form-ing the connecting links between them. The dendrites of these cells all rise ashigh as the molecular layer, and some pass to its extreme outer limit. The bulbarendings of the collaterals are seen situated among the gemmules upon the branchesof the dendrites. <?., &., &., intermediary Golgi cells of
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