The development of the human body; a manual of human embryology . this muscle, while its upperparts become the occipito-frontalis and the superficialmuscles of the face (the muscles of expression), togetherwith the fasciae which unite the various muscles of thisgroup. The extension of the platysma sheet of musclesover the face is well shown by the development of thebranches of the facial nerve which supply it (Fig. 115). The degeneration of the upper part of the third archproduces a shifting forward of one of the muscles derivedfrom its branchiomere, the stylopharyngeus arising fromthe base of
The development of the human body; a manual of human embryology . this muscle, while its upperparts become the occipito-frontalis and the superficialmuscles of the face (the muscles of expression), togetherwith the fasciae which unite the various muscles of thisgroup. The extension of the platysma sheet of musclesover the face is well shown by the development of thebranches of the facial nerve which supply it (Fig. 115). The degeneration of the upper part of the third archproduces a shifting forward of one of the muscles derivedfrom its branchiomere, the stylopharyngeus arising fromthe base of the styloid process. The innervation of thismuscle by the ninth nerve indicates, however, its truesignificance, and since fibers of this nerve of the thirdarch also pass to the constrictor muscles of the pharynx,a portion of these must also be regarded as having arisenfrom the third branchiomere. The cartilages of the fourth and fifth arches enter intothe formation of the larynx and the muscles of the corre-sponding branchiomeres constitute the muscles of the.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
