The Relation of Science and Religion.pdf - Online Christian Library

MAN'S PLACE Ifl THE WORLD. 267nute medullated nervesbres arise." * "Frornthe observations of Lockhart Clark, Arndt,Cleland and Meynert, there can be no doubtthat the pyramidal nerve cells vary in 'elativesize and in numbers in the differentlayers of the gray cortex, and that the largestsized pyramidal cells lie in the third andfourth layers."-f- " Large pyramidal cells arefound in the frontal lobe in considerable numbers,"but it is added, "there is no difficultyin recognizing in the occipital lobe" (theback region of the brain) " a small proportionof cells quite equal in magnitude to thelargest cells of the frontal lobe."$From these statements, it is easy to judgewhat value can be attached to the conjecturethat multipolar or pyramidal cells are to beregarded as " mind-cells." The result maybe summarized thus; (1) The larger cells areinvariably distinguished by the number offibres given off', or the lines of communicationthey have with other parts of the tissue; (2)As to distribution of these cell-fibres appearingin the brain, it is found that as the cellsthemselves are in the lower strata of the graymatter, the majority of their fibres stretch* Human Anat., i. p. 201. t Ib. p. 282. J See Appendix Xa