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Facial Ex. Muscles

Anatomy

QuestionAnswer
Characteristics (4) 1. Skin muscles located in superficial fascia2. Attachments- ORIGINS: fascia or bone INSERTIONS: usually skin3. Indistinctly separated from eachother4. Innervated by the facial nerve (CN VII)
Groupings (5) 1. Scalp2. Ear3. Eye4. Nose5. Mouth
Scalp Muscles (2) 1. Occipitofrontalis2.Muscle Epicranius
Occipitofrontalis What it does What joins the bellies? Draws scalp posteriorly & raises eyebrows (SURPRISE)Galea aponeurotica- helmet-like, bind frontal and occipital bellies
Muscle Epicranius Collective name for group including; Occipitofrontalis and its galea aponeurotica, and temporoparietalis muscle.
Temporoparietalis Muscle Originates? arises from the fascia of the temporalis m. above and anterior the the ear
Temporoparietalis Muscle Inserts? inserts into the aponeurotica.** Variable in its development**Acts in helping to keep the scalp tight.(very scant fibersw in Netter)
Ear Muscles do what? Located? Originate and insert? move the pinna but are slightly or not effective in humans-located superficial to the temporalis muscle-arise from fascia of the temporalis-insert into pinna (ext.ear)
Ear Muscles (3) 1.Anterior auricular (pulls pinna ant)2. Posterior auricular (" post)3. Superior Auricular (" Sup)
Eye Muscles (2) 1. Orbicularis Oculi (sphincter- 3 parts)2. Corrugator Supercilii ( deep to frontalis & Orb. Oc.)
Orbicularis Oculi 3 parts 1. Pars orbitalis2. Pars palpebralis3. Pars lacrimalis
Pars Orbitalis Peripheral outer partCloses eye
Pars palpebralis Inner part of lids Closes eyelids
Pars lacrimalis Where? What it does? Lies deep to palpebral part Compresses lacrimal sac & draws lacrimal puncta medially
Corrugator Supercilii Where? What it does? Deep to frontalis & Orbicularis Oculi Draws eyebrows downward & medially as in frowning
Nose Muscles (3) 1. Procerus2. Nasalis (2 parts)3. Depressor Septi Nasi
Procerus What it does? Draws medial angle of eyebrowsdownward and wrinkles skin on bridge of nose.
Nasalis (2 Parts) 1. pars alaris 2. pars transversa
Pars Alaris (Dilator Naris) Widens Nostril
Pars transversa (Compressor naris) Depresses cartilage of nose and compresses the nostril
Depressor Septi Nasi Controversial Constricts the nostril
Muscles inserting on upper lip (3) 1. Levator Labii Superioris 2. Levator Labii Superioris Alaequem Nasi 3. Zygomaticus Minor
Levator Labii Superiorus raises upper lip
Levator Labii Superiorus Alaeque Nasi Inserts into upper lip & alar (wings) of nose , raises upper lip and dilates nostril
Zygomaticus Minor Arises from zygomatic bone; moves upper lip upward and outward
Muscles inserting on corner of mouth (5) 1. Zygomaticus Major 2. Levator Anguli Oris 3. Risorius 4. Depressor anguli Oris 5. Buccinator
Zygomaticus Major Arises from Zygomatic Bone; the "laughing muscle", raises corner of mouth as in laughing
Levator Anguli Oris raises angle(corner) of mouth as in disdain
Risorus "smile/Grin" muscle; draws corner of mouth laterally as in smiling
Depressor Anguli Oris (Triangularis) Depresses angle (corner) of mouth
Buccinator Compresses cheeks during chewing(mastication) and also during blowing (trumpet)Muscle is deep to zygomaticus major and risorus
Muscles inserting on lower lip (2) 1. Depressor Labii Inferioris2. Mentalis
Depressor Labii Inferioris Depresses lower lip
Mentalis Protrudes lower lip & wrinkles skin on chin
Muscles Encircling Mouth (1) Orbicularis Oris - sphincter 2 parts
Orbicularis Oris The kissing muscle -purses and puckers lipsthus closing them
2 parts of Orbicularis Oris 1. Pars marginalis2. pars labialis
Pars Marginalis peripheral part around lips
Pars Labialis Central part on lips
Platysma Muscle- Whats it like?Origin, Insertion, Action Thin flat paper-like muscle ORIGIN: fascia of cervical region INSERTION: Lower mandible and skin around the mouth ACTIONS: Retracts and depresses the angles of mouth as in horror, producing wrinkles on skin of neck; also helps depress mandible
Created by: Destini
 

 



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