. Comparative anatomy. Anatomy, Comparative. THE NERVOUS SYSTEM 505 fibers to and from the cortex. The corpus striatum may be considered as a front porch or main entrance to the higher centers of the brain. Sympathetic functions are ascribed to it. Evolution of the Diencephalon. The evolutionary potential of the diencephalon is low, and it changes little from fish to man. The founda- TURGENIEFF, 7 2012 C TAGUCHI l«0 G - BYRON I007G - THACKEBY lesoo. HACKEL 1575 G AGASSIZ 1495 G — NORMAL SCHUBERT 1420 G. - LIEBIG I3ff2 G WHITMAN 1202 G. DOLUNGER iiai G AMATOLE FRANCE. WEIGHT IN GRAMS. '
. Comparative anatomy. Anatomy, Comparative. THE NERVOUS SYSTEM 505 fibers to and from the cortex. The corpus striatum may be considered as a front porch or main entrance to the higher centers of the brain. Sympathetic functions are ascribed to it. Evolution of the Diencephalon. The evolutionary potential of the diencephalon is low, and it changes little from fish to man. The founda- TURGENIEFF, 7 2012 C TAGUCHI l«0 G - BYRON I007G - THACKEBY lesoo. HACKEL 1575 G AGASSIZ 1495 G — NORMAL SCHUBERT 1420 G. - LIEBIG I3ff2 G WHITMAN 1202 G. DOLUNGER iiai G AMATOLE FRANCE. WEIGHT IN GRAMS. '200-1000. ORANG OUTAN. 350 G Fig. 421.—Variation in human brain size. The range is from 369 grams to 2400 grams, both of these extremes being the brains of idiots. The average male brain weighs 1400 grams. (Redrawn after Kahn's "Das Leben Des Mensschen," W. Keller & Co.) tions of the human brain are laid in that of cyclostomes. Three regions are distinguishable in the primitive diencephalon of cyclostomes, a dorsal epithalamus, a lateral thalamus, and a ventral hypothalamus. The epithelial roof remains thin, and there is no velum transversum to divide the diencephalon from the telencephalon. Three dorsal outgrowths arise from the epithalamus, an anterior paraphysis, a parietal outgrowth or. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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