. Anatomy, descriptive and applied. Anatomy. 390 THE MUSCLES AND FASCIA situated immediately beneath the anterior belly of the Digastric, and forming, with its fellow of the opposite side, a muscular floor for the cavity of the mouth. It arises from the whole length of the mylohyoid ridge of the mandible, extending from the symphysis in front to the last molar tooth behind. The posterior fibres pass inward and slightly downward, to be iiiserted into the body of the hyoid bone. The middle and anterior fibres are inserted into a median fibrous raphe, extending from the symphysis of the mandible
. Anatomy, descriptive and applied. Anatomy. 390 THE MUSCLES AND FASCIA situated immediately beneath the anterior belly of the Digastric, and forming, with its fellow of the opposite side, a muscular floor for the cavity of the mouth. It arises from the whole length of the mylohyoid ridge of the mandible, extending from the symphysis in front to the last molar tooth behind. The posterior fibres pass inward and slightly downward, to be iiiserted into the body of the hyoid bone. The middle and anterior fibres are inserted into a median fibrous raphe, extending from the symphysis of the mandible to the hyoid bone, where they join at an angle with the fibres of the opposite muscle. The median raphe is sometimes wanting; the muscle fibres of the two sides are then directly continuous with one another. Relations.—By its superficial surface, with the Platysma, the anterior belly of the Digastric, the suprahvoid aponeurosis, the submaxillary gland, submental vessels, and mylohyoid vessels and nerve; by its deep surface, with the Geniohyoid, part of the Hyoglossus and Styloglossus muscles, the hypoglossal and lingual nerves, the submaxillary ganglion, the sublingual gland, the deep portion of the submaxillary gland and duct; the sublingual and ranine vessels, and the buccal mucous Fig. 301.—Muscles of the tongue. Left Dissection.—The Mylohyoid should now be removed, in order to expose the muscles which lie beneath; this is effected by reflecting it from its attachments to the hyoid bone and man- dible, and separating it by a vertical incision from its fellow of the opposite side. The Geniohyoid (?«. geniohyoideus) (Fig. 301) is a 'narrow, slender muscle, situated immediately beneath^ the inner border of the Mylohyoid. It arises from the inferior genial tubercle on the inner side of the symphysis of the mandible, and passes downward and backward, to be inserted into the anterior surface of the body of the hyoid bone. This muscle lies in close contact
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
