. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE LIMB MUSCLES 211 dermis (see p. 143). It may mean only that the nerves, being seg- mental, retain their segmental relations to one another even in their distribution to non-metameric structures, and that, consequently, the limb musculature is supplied in succession from one border of the limb bud to the other from succeeding nerve roots. But whether further observation may prove or disprove the myotomic origin of the limb musculature, the fact remains that it possesses a segmentally arran
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE LIMB MUSCLES 211 dermis (see p. 143). It may mean only that the nerves, being seg- mental, retain their segmental relations to one another even in their distribution to non-metameric structures, and that, consequently, the limb musculature is supplied in succession from one border of the limb bud to the other from succeeding nerve roots. But whether further observation may prove or disprove the myotomic origin of the limb musculature, the fact remains that it possesses a segmentally arranged innervation, and it is possible,. Fig. 123.—Diagram of a Segment of the Body and Limb. bl, Axial blastema; dm, dorsal musculature of trunk; rl, nerve to limb; s, septum between dorsal and ventral trunk musculature; , dorsal layer of limb musculature; and , dorsal and ventral divisions of a spinal nerve; vm, ventral musculature of the trunk.—(Kollmann.) therefore, to recognize in the limb buds a series of parallel bands of muscle tissue, extending longitudinally along the bud and each supplied by a definite segmental nerve. And furthermore, corre- sponding to each band upon the ventral (praeaxial) surface of the limb bud, there is a band similarly innervated upon the dorsal (post- axial) surface, since the fibers which pass to the limb from each nerve root sooner or later arrange themselves in praeaxial and postaxial. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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