. A system of anatomy for the use of students of medicine (Volume 1). asi, from a belief, in whichBougery coincides, that when it acts with its extremity upon thenose as the fixed point, it dilates the nostril. When the otherextremity of the muscle is the fixed point, it compresses it.— Fig. 17. Muscles of the Mouth andLips. The mouth has ninepair of muscles, which areinserted into the lips, anda common one formed bythe termination of these,viz. three above, threebelow, three outwards, andthe common muscle sur-rounds the mouth. The three above are, 1. Levator Anguli Oris, Arises, thin and fles
. A system of anatomy for the use of students of medicine (Volume 1). asi, from a belief, in whichBougery coincides, that when it acts with its extremity upon thenose as the fixed point, it dilates the nostril. When the otherextremity of the muscle is the fixed point, it compresses it.— Fig. 17. Muscles of the Mouth andLips. The mouth has ninepair of muscles, which areinserted into the lips, anda common one formed bythe termination of these,viz. three above, threebelow, three outwards, andthe common muscle sur-rounds the mouth. The three above are, 1. Levator Anguli Oris, Arises, thin and fleshy,from the hollow of thesuperior maxillary bone,between the root of thesocket of the first dens molaris and the foramen infra orbita-rium. * The nasal slip of fibres descending from the occipito-frontalis, is sometimesspoken of as a distinct muscle, under the name of PyramidMis nasi. Fig. 17.—g,Occipito-frontalis. I, Levator labii superioris ala?que nasi. Z, Levator anguli , Compressor naris. o, Orbicularis palpebrarum ; the external palpebral ligament,. 2Q0 MUSCLES OF THE FACE. Inserted into the angle of the mouth and under lip, where itjoins with its antagonist. Use. To draw the corner of the mouth upwards, and makethat part of the cheek opposite to the chin prominent, as insmiling. 2. Levator Labii Superioris Alceque Nasi, Arises by two distinct origins: the first broad and fleshy, fromthe external part of the orbitar process of the superior maxillarybone which forms the lower part of the orbit, immediately abovethe foramen infra-orbitarium; the second portion arises from thenasal process of the superior maxillary bone, where it joins theos frontis at the inner canthus, descending along the edge of thegroove for the lachrymal sac. The first and shortest portion is Inserted into the upper lip and orbicularis labiorum; thesecond and longest, into the upper lip and outer part of the alanasi. Use. To raise the upper lip towards the orbit, and a little out-wards ; the
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Keywords: ., bookcentury1800, bookid101532043x1nlmnihgov, booksubjectanatomy
