Muslces of Facial Expression
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| Where are skin muscles located? | Superficial fascia
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| How are the skin muscles separated | indistinctly from one another
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| What nerve are skin muscles innervated by | the facial nerve (CN VII)
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| What are the Muscles of the scalp (2) | Occipitofrontalis and temporoparietalis m.
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| Muscle that draws scalp posteriorly and raises eyebrows as in an expression of surprise | Occipitofrontalis
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| What is the galea aponeurotica of the occipitofrontalis | helmet-like aponeurosis joining the frontal and occipital bellies of this muscle
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| Collective name for occipitofrontalis and its galea aponeurotica, and the temporoparietalis m. | Muscle Epicranius
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| arises from fascia of temporalis m. above and anterior to the ear. inserts into the galea aponeurotica | Temporoparietalis muscle
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| It is variable in its development, acts in helping to keep the scalp tight | temporoparietalis muscle
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| What are the muscles of the ear (3) | Anterior Auricular muscle, Posterior Auricular muscle, Superior Auricular muscle
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| located superficial to the temporalis muscle, arise from fascia of the temporalis muscle and insert into pinna | Anterior Auricular muscle, Posterior Auricular muscle, Superior Auricular muscle
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| Action of the Anterior Auricular muscle | pulls pinna anteriorly
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| Action of the Posterior Auricular muscle | pulls pinna posteriorly
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| Action of the Superior Auricular muscle | pulls pinna superiorly
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| What are the muscles of the Eye (2) | Orbicularis Oculi, Corrugator Supercilii
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| What is the Orbicularis Oculi | a sphincter muscle consisting of 3 parts. The pars orbitalis, pars palpebralis, and the pars lacrimalis
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| Peripheral outer part surrounding orbit; closes the eye | Pars Orbitalis
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| Inner part of lids; closes eyelids | Pars Palpebralis
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| Lies deep to palpebral part in medial corner of eye, compresses lacrimal sac, draws lacrimal puncta medially | Pars Lacrimalis
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| Located deep to frontalis and orbicularis oculi | Corrugator Supercilii
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| Action of Corrugator Supercilii | Draws the eyebrows downward and medially as in frowning
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| What are the muscles of the nose? (3) | Procerus, Nasalis, Depressor Septi Nasi
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| Action of Procerus | Draws medial angle of eyebrows downward, and wrinkles skin on bridge of nose
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| What are the 2 parts to Nasalis | Pars Alaris, Pars Transversa
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| Action of pars alaris aka(dilator naris) | Widens nostril
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| Action of pars transversa aka (compressor naris) | depresses cartilage of nose and compresses the nostril
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| Action of Depressor Septi Nasi | constricts the nostril
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| What are the muscles of the mouth? (12) | Levator Labii Superioris, Levator Labii Superioris Alaeque Nasi, Zygomaticus Minor, Zygomaticus Major, Levator Anguli Oris, Risorius, Depressor Anguli Oris, Buccinator, Depressor Labii Inferioris, Mentalis, Orbicularis Oris, Platysma muscle
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| Muscles inserting on Upper Lip (3) | Levator Labii Superioris, Levator Labii Superioris Alaeque Nasi, Zygomaticus Minor
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| Inserts on upper lip, action is it raises the upper lip | Levator Labii Superioris
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| Inserts into upper lip and alar (wings) part of nose. Action is it raises upper lip and dilates naris (nostril) | Levator Labii Superioris Alaeque Nasi
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| Arises from zygomatic bone, action is it moves upper lip upward and outward | Zygomaticus Minor
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| Muscles Inserting on Corner of Mouth (5) | Zygomaticus Major, Levator Anguli Oris, Risorius, Depressor Anguli Oris, Buccinator
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| inserts on corner of mouth, arises from zygomatic bone, raises corner of mouth as in laughing | Zygomaticus Major "laughing muscle"
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| inserts on corner of mouth, action is it raises angle (corner) of the mouth as in disdain | Levator Anguli Oris
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| inserts on corner of mouth, draws corner of mouth laterally as in smiling | Risorius "smile (grin) muscle"
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| inserts on corner of mouth, action is it depresses angle (corner) of mouth | Depressor Anguli Oris aka (triangularis)
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| inserts on corner of mouth, action is compresses cheeks against teeth during mastication (chewing) and also during blowing. Located deep to Zygomaticus major and Risorius | Buccinator
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| Muscles Inserting on Lower Lip (2) | Depressor Labii Inferioris, Mentalis
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| inserts on lower lip, action is it depresses lower lip | Depressor Labii Inferioris
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| inserts on lower lip, action is it protrudes lower lip and wrinkles skin on chin | Mentalis
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| Muscles encircling Mouth | Orbicularis Oris, Platysma Muscle
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| a sphincter muscle consisting of 2 parts; the "kissing muscle"-purses(puckers) lips, thus closing them | Orbicularis Oris
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| What are the 2 parts to the Orbicularis Oris | pars marginalis, pars labialis
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| Peripheral part around lips. part of Orbicularis Oris | Pars Marginalis
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| Central part around lips. Part of Orbcularis Oris | Pars labialis
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| Thin flat paper-like muscle that encircles the mouth | Platysma Muscle
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| Origin, Insertion, and Action of Platysma Muscle | O: fascia of cervical
I: lower mandible and skin around mouth
A: retracts and depresses angle of mouth as in horror, producing wrinkles on skin of neck; also helps in depressing mandible
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