. A treatise on practical anatomy: for students of anatomy and surgery . xternal to quadratus —Angle of mouth. It is a depressor of —^^Facial. > ? . , Levator Mentl X->f^^ ^^ t^tM^-^ Origin—At each side of septum, incisive fossa below alveolar —Skin at lower part of —Facial.^, Orbicularis Oris. Origin—Sphincter of the mouth. Consists of twothick serai-elliptical planes of muscular fibres, whichsurround the mouth.^ Insertion—A few fibres are attached to the superiormaxillary and two conical fasciculi, pass upward tothe sides to the anteri
. A treatise on practical anatomy: for students of anatomy and surgery . xternal to quadratus —Angle of mouth. It is a depressor of —^^Facial. > ? . , Levator Mentl X->f^^ ^^ t^tM^-^ Origin—At each side of septum, incisive fossa below alveolar —Skin at lower part of —Facial.^, Orbicularis Oris. Origin—Sphincter of the mouth. Consists of twothick serai-elliptical planes of muscular fibres, whichsurround the mouth.^ Insertion—A few fibres are attached to the superiormaxillary and two conical fasciculi, pass upward tothe sides to the anterior nasal spine, and are insertedinto the upper lip. The depression between thesebundles is immediately below the septum —Facial. MUSCLES OF THE FACE. 183 •-Buccinator. Origin—Anterior edge of pterygo-maxillary ligament;also, from the alveolar process above and below themolar teeth. Insertion—Is a bipenniform muscle. The fibres passforward and are continuous with those of the orbic-ularis oris. Nerves—Facial and inferior Fig. 83.—Temporal. Muscle. RiSORIUS. Origin—Fascia over masseter —Angle of — Origin—Two portions, superficial and deep. Super-ficial, from inferior border of malar and inferior 184 PRACTICAL ANATOMY. border of anterior portion of zygoma ; deep portion, from inferior border of —Angle and external surface of the ramus of the inferior —Inferior maxillary.^ Temporal. Origin—Temporal fossa. Insertion—Superior and anterior portion of coronoid process of inferior —Inferior maxiUary nerve.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomy, bookyear1891
