A manual of anatomy . as indicated by their names. Nerves.—All are supplied by the facial nerve. 148 MYOLOGY THE ORAL REGION The m. orbicularis oris is a sphincter muscle connected with theother muscles that converge at the mouth. The superior part isattached to the nasal septum {nasolabial band) and the incisorfossa {superior incisive fasciculus which is continuous with themm. buccinator and caninus); the inferior part is attached to themandible at each side of the symphysis {inferior incisive fasciculiswhich is continuous with the mm. buccinator and caninus); laterallyit is joined by the buc
A manual of anatomy . as indicated by their names. Nerves.—All are supplied by the facial nerve. 148 MYOLOGY THE ORAL REGION The m. orbicularis oris is a sphincter muscle connected with theother muscles that converge at the mouth. The superior part isattached to the nasal septum {nasolabial band) and the incisorfossa {superior incisive fasciculus which is continuous with themm. buccinator and caninus); the inferior part is attached to themandible at each side of the symphysis {inferior incisive fasciculiswhich is continuous with the mm. buccinator and caninus); laterallyit is joined by the buccinator, the elevators and depressors of thelower lip at the angle of the mouth. The m. quadratus labii superioris consists of the three followingmuscles: The caput infraorbitale, or levator labii superioris, arises from themaxilla just above the infraorbital foramen \(\. joins the orbicularisoris muscle. Depressor septi Incisivus labii superiorisOrbicularis oris —t:£^TO^Iw .<^^^.^d^^^^%feMM^£(C-v Caninus. Quadratus labii inferioris Mentalis TnancSulffris Fig. 117.—The oral musculature seen from behind. The muscles, together with theintegument, have been separated from the bones, and the mucous membrane covering themuscles has been removed. {Sobotta and McMurrich.) The caput angulare has been described above. The caput zygomaticus, or zygomaticus minor arises from thezygomatic bone and is inserted into the margin of the orbicularis orismuscle. The m. caninus, or levator anguli oris, arises from the canine fossaof the maxilla and is inserted into the orbicularis oris and the skin ofthe angle of the mouth. The m. zygomaticus (major) arises from the zygomatic arch and isinserted into the skin and into the orbicularis oris muscle. The m. triangularis, or depressor anguli oris, arises from theoblique line of the mandible and is inserted into the skin and theorbicularis oris muscle. The m. risorius is a portion of the platysma muscle arising fromthe fascia over the paro
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
