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

simpler in tlie arrangement of its convolutions,but so closely approximating that the exactstate of the case is as nearly as possible described,if we say that the brain of the ape,while it is decidedly smaller, appears like aminiature of the human brain in a slightlyundeveloped state."The human brain is an elaborate organ, exceedinglycomplicated in its convolutions. Wecan not, indeed, describe it as the most coiivoluted,for the brain of the elephant is at leastas distinguished for the beauty and complicationof its folding, and the brain of the whaleis far more minute and detailed, presentingquite a multitude of minute convolutions.For descriptive purposes, the huinan brain isdivided into four superficial areas, known aslobes, and pretty clearly defined by certainnatural boundaries. From the lower part ofthe organ, entering at a point scarcely halfway back is a fissure or cutting running upinto the m ass in a direction uniformly incliningtowards the rear, known as the Sylvianfissure; while coming over the summit, ata point near the middle, and inclining downtowards that just described, is another fissure,known as the fissure of Rolando. By these* See Appendix XI.