. Cunningham's Text-book of anatomy. Anatomy. The muscular substance of the tongue consists of two symmetrical series of muscles placed on either side of a membranous raphe in the median plane. The series comprise (1) extrinsic M" Superior™118 M" HBgu^alis muscles arising from the soft ^«wlww Palate> styloid process, hyoid /,\, Mllt bone and mandible, and (2) intrinsic muscles proper to the tongue itself. Each set consists of four series of muscles. A. The extrinsic mus- cles are four in number: (1) genioglossus, (2) hyo- glossus, (3) styloglossus, and (4) glossopalatinus. M. Geni
. Cunningham's Text-book of anatomy. Anatomy. The muscular substance of the tongue consists of two symmetrical series of muscles placed on either side of a membranous raphe in the median plane. The series comprise (1) extrinsic M" Superior™118 M" HBgu^alis muscles arising from the soft ^«wlww Palate> styloid process, hyoid /,\, Mllt bone and mandible, and (2) intrinsic muscles proper to the tongue itself. Each set consists of four series of muscles. A. The extrinsic mus- cles are four in number: (1) genioglossus, (2) hyo- glossus, (3) styloglossus, and (4) glossopalatinus. M. Genioglossus.— The genioglossus muscle ( geniohyoglossus) m. transversus (Eig. 408, p. 459) is an ex- jngitBudinans trinsic muscle of the tongue inferior as well as a supra-hyoid muscle. It is a fan-shaped muscle arising by its apex from the superior of the two mental spines, behind the symphysis of the mandible (Fig. 410, p. 461). Erom this origin the muscular fibres diverge; the lowest fibres are directed downwards and backwards, to be inserted into the body of the hyoid bone; the highest fibres curve forwards, to be attached to the tip of the tongue; the inter- mediate fibres are attached to the substance of the tongue in its whole length between the base and tip. The muscles of opposite sides are separated by the median raphe of the tongue. On the lateral aspect of each are the hyoglossus and mylo-hyoid muscles. M. Hyoglossus.—The hyoglossus muscle is also an extrinsic muscle of the tongue as well as a supra-hyoid muscle. It arises from the body and great cornu of the hyoid bone. It is directed upwards and forwards, to be inserted into the side of the tongue, its fibres interlacing with the fibres of the styloglossus. The muscle is quadrilateral, and lies between the genioglossus and mylo-hyoid muscles, separated from the latter by the mucous membrane of the floor of the mouth, the sublingual and part of the submaxillary glands, the lingual and hypo- glossal nerves,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
