Muscle of the facial expression

Although most of these muscles originate on bone, most do not insert on bone; rather, they insert into the dermis of the skin and freely intermingle with muscles in their vicinity. Both muscles are involved in elevating the upper lip to generate a smile, with the minor muscle allowing us to curl our top lip which usually demonstrates smugness. The mentalis is a small muscle of the chin. A thick-fan shaped muscle that closes the mouth and assists the jaw to move side-to-side to grind up food. Biceps flexor cruris muscle, semi-tendinosus muscle, distal portion of the semimembranosus muscle. The orbicularis oculi is innervated by the temporal and zygomatic branches of the facial nerve and acts to close the eyelid completely.
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MUSCLES OF THE FACIAL EXPRESSION

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Facial muscles

The deep layer of the muscles of facial expression. Forceful closure is mediated by the orbital portion, whereas the palpebral portion is responsible for light closure, as in blinking. All of the five muscles acting to elevate the lips are innervated by the buccal branches of the facial nerve. The circular muscle around our mouth is Orbicularis Oris and this muscle brings our lips together so we can pucker up for a kiss! Auricularis superior or attollens auriculam and auicularis anterior or attrahens auriculam muscles.
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The muscles of the face - Forensic Facial Reconstruction

The levator labii superioris originates from the maxilla and zygoma just inferior to the orbit. Upon contraction, this arrangement and groupings of muscles about the orifices of the face convey movements about these orifices that we interpret as emotions. An inability to form facial expressions on one side of the face may be the first sign of damage to the nerve of these muscles. It originates below the infraorbital foramen, from the canine fossa of the maxilla, to insert into the corner of the mouth. Nasal process of frontal bone, frontal process of maxilla, medial palpebral ligament, and lacrimal bone. University of Strathclyde. Views Read Edit View history.
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It lies deep to the muscles of facial expression and is separated from them by the buccopharyngeal facia and the buccal fat pad. Buccal branches of the facial nerve innervate this complex muscle, which closes the lips and, during stronger contraction, purses them, as in osculation and whistling. The orbital portion of the muscle describes an oval around the orbit. Upon contraction, this arrangement and groupings of muscles about the orifices of the face convey movements about these orifices that we interpret as emotions. Depressor Anguli Oris This muscle lowers the corners of our mouth into a frown. Gross Anatomy Board Review.
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