. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. THE NERVOUS SYSTEM OF MAN. 41 of this part. It is therefore the part most immediately necessary to life. The gray matter of the medulla is the center controlling automatically the most vital pro- cesses of the body. Removal of this produces immedi- ate death. Optic Lobe.—This is probably the immediate con- troller of the sense of sight; its destruction, therefore, destroys that sense. The optic nerve, coming from the eye, sends one root to the optic lobes and another to the thalam
. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. THE NERVOUS SYSTEM OF MAN. 41 of this part. It is therefore the part most immediately necessary to life. The gray matter of the medulla is the center controlling automatically the most vital pro- cesses of the body. Removal of this produces immedi- ate death. Optic Lobe.—This is probably the immediate con- troller of the sense of sight; its destruction, therefore, destroys that sense. The optic nerve, coming from the eye, sends one root to the optic lobes and another to the thalamus. The latter sends an influence to the visual area of the cerebrum. We will explain this more fully later. Thalamus and Corpus Striatum.—These ganglia are undoubtedly very important and very necessary to life. Their function is still ob- scure, but from their con- nection with the cerebrum on the one hand, and the rest of the body on the other, they seem to be an intermediarybetween these two. Sense impressions from surfaces and sense organs, on their way to the cerebrum, seem to pass through the thalamus and receive impulse from that organ; and impulses or mandates from the cere- brum on their way outward to the muscles seem to pass through the corpus stria- tum and receive fresh impulse there. They are relay batteries in the course of communication between brain and body (Fig. 27). They are, moreover and especially, centers of semiautomatic or habitual movements. There are. Fig. 27.—Diagram showing supposed function of thalamus and corpus striatum in relation to the cere- brum : cs, cerebral sensory; cm, motor ; csm, corpus striatum ; ths, sensory Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York, D. Appleton and Company
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