A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . the secondaryolfactory area at first were functionallymuch alike (cyclostomes); but in the courseof further evolution this primordial simplesecondary olfactory area becomes differen-tiated into many regions of very unlikenature. This specialization has takenplace under the influence of fibers ascend-ing from different lower non-olfactorycenters in the diencephalon, etc., forvarious kinds of olfactory correlations. Ingeneral, fibers from the hypothalamus havereached
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . the secondaryolfactory area at first were functionallymuch alike (cyclostomes); but in the courseof further evolution this primordial simplesecondary olfactory area becomes differen-tiated into many regions of very unlikenature. This specialization has takenplace under the influence of fibers ascend-ing from different lower non-olfactorycenters in the diencephalon, etc., forvarious kinds of olfactory correlations. Ingeneral, fibers from the hypothalamus havereached the medial and dorsal parts of theolfactory area, while those from the thal-amus have reached its lateral parts. In the mammals, accordingly, we recog-nize in the area olfactoria the followingparts: First, at the base of the olfactorybulb and extending more or less forwardinto the bulb is a 7iucleus olfactorius anterior, remnant of the primitive secondarynucleus which receives no important ascending tractsfrom the diencephalon. This is the region of the tri-gonum olfactorium of man. S?cond, we recognize an. corpuscorpus tr olf. lateralis f. endorhinalis hippocampicortex hippocampi)i^zona limitanstuberculum oLf. Fio. 966.—Transverse Section from the same Series as Fig. 965, Passingthrough the Rostral End of the Hemisphere in Front of the Corpus Callosum,to Illustrate the Relations of the Precommissural Hippocampus (c/., Fig. 964).The forms of the cortex hippocampi and fissura hippocampi here are similarto those of marsupial brains in the corresponding region (Fig. 962). The fissurahippocampi is the forward continuation of the sulcus corporis callosi as seenin Fig. 961. area olfactoria lateralis, which receives the lateral olfac-tory tract. It includes anteriorly the relatively un-specialized nucleus olfactorius lateralis (Fig. 965, n. ), which in the human brain extends as far back asths limen insulae (Figs. 93S, 953,
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
