. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . y, theglandular simile lost its force, and the opinion that each fibre orset of fibres—^like each nerve—had something specific to do, becamealmost a matter of compulsion. § 13. We begin, then, our search for more definite knowledge as tothe localization of cerebral functions with strong presumptions inits favor. The cerebral cortex is itself a very complex organ, or 226 THE CEREBRAL HEMISPHERES system of organs. Its different regions are marked by com
. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . y, theglandular simile lost its force, and the opinion that each fibre orset of fibres—^like each nerve—had something specific to do, becamealmost a matter of compulsion. § 13. We begin, then, our search for more definite knowledge as tothe localization of cerebral functions with strong presumptions inits favor. The cerebral cortex is itself a very complex organ, or 226 THE CEREBRAL HEMISPHERES system of organs. Its different regions are marked by compara-tively slight, and yet not insignificant, differences of structure; theystand in different local relations and nervous connections with oneanother and with the ganglia lying below. This outlying rind ofgray nervous matter is, of course, not a homogeneous mass. It ismade up of innumerable nervous elements combined in variousways and multiform connections. It may be regarded, then, as acomplex of organs. Most of our definite knowledge concerning the functions of theother parts of the nervous mechanism also creates a presumption in. Fig. 99a.—The Same as Fig. 99, Mesial Surface. favor of some localization of cerebral functions. All the differentparts of this mechanism are, indeed, constructed by combining vari-ously a few elements of essentially the same structure; all of themlikewise are capable of exercising essentially the same neural func-tions. But each part of this mechanism has also its special func-tions. Thus we found that the different nerves become classifiedfunctionally; some are motor, voluntary or involuntary, some in-hibitory, some secretory, some sensory, etc. Hints of a certainkind of classification may be discovered for the smaller ganglia orcollections of nerve-cells. In making transverse sections of thecord, different regions with different functions appear. Consid-ered longitudinally, the cord is capable of being more or less defi-nitely divided in
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