. Quain's Elements of anatomy. foramen is the somewhat indefinite external oUkiue line, running from themental tubercle backwards and upwards to the anterior margin of the ramus. Thedeep surface is marked, on each side of the symphysis, along the inferior margin, byan oval depression, indicating the anterior attachment of the digastric muscle. THE IXFERIOR MAXILLARY BOXE. 59 Above this are the mental spmes, the lower being a small median ridge (often only aslight roughness), to which the genio-hyoid muscles are attached, and the iij^per apair of more prominent tubercles, giving origin to the g
. Quain's Elements of anatomy. foramen is the somewhat indefinite external oUkiue line, running from themental tubercle backwards and upwards to the anterior margin of the ramus. Thedeep surface is marked, on each side of the symphysis, along the inferior margin, byan oval depression, indicating the anterior attachment of the digastric muscle. THE IXFERIOR MAXILLARY BOXE. 59 Above this are the mental spmes, the lower being a small median ridge (often only aslight roughness), to which the genio-hyoid muscles are attached, and the iij^per apair of more prominent tubercles, giving origin to the genio-glossi. Above theupper spines a small median foramen penetrates the bone, and continued upwardsfrom this there is often to be seen a narrow groove marking the symphysis. Begin-ning below the mental spines, and passing backwards and upwards to the ramus, is:he prominent interned oblique line or mijlo-hfjoid ridge, which gives origin to themylo-hyoid muscle, and at its hinder end to a slip of the superior constrictor of the. Fig. 6L—The inferior maxillary bone, from the right side. (Drawn by D. Gunn.) pharynx. Above this line is a smooth depression for the sublingual gland, andmore posteriorly beneath it another for the submaxillary gland. The ramus is thinner than the body of the bone. Its posterior border in meetingthe line of the base forms the angle of the jaw, which is more or less rounded off,and usually a little everted. The external surface is flat and impressed by themasseter ; towards the angle irregular oblique ridges mark the attachment oftendinous bundles of the muscle. The internal surface presents about its middle,and on a level with the crowns of the lower molar teeth, the inferior dental foramen,leading into the dental canal, which lodges the dental nerve and vessels. The innermargin of the foramen is sharp and prominent anteriorly, forming the at a notch behind the linguia is the mglo-ligoid groove (occasionally acanal for a short sjiace
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
