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35 Cards in this Set
- Front
- Back
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Mimetic muscles are the basis of?
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Facial expressions - important for us social humans
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Mimetic muscles may be divided into?
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Regions or according to facial expressions
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Regions of mimetic muscles?
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1. Muscles of scalp
2. Muscles of eyelid region 3. Muscles of nasal region 4. Muscles of mouth region |
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Muscles of the scalp?
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Epicranius muscles:
- Occipitofronalis (occipital & frontal belly of epicranius) - Temporoparetialis muscle |
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What connects the frontal & occipital belly of epicranius?
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Epicranial aponeurosis
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Occipital belly of occipitofrontalis, origin?
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From lateral 2/3 of highest nuchal line
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Frontal belly of occipitofrontalis, origin?
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From skin&subcutaneous tissue of eyebrow + glabellar region
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Temporoparetialis, origin insertion?
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O: Epicranial aponeurosis (galea aponeurotica)
I: Auricular cartilage |
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Function, facial expression & innervation of frontal belly of occipitofrontalis muscle?
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F: Lift eyebrows & upper eyelids. Wrinkles in forehead.
Exp: Astonishment Inn: Facial nerve |
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Muscles of the eyelid region?
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- Orbicularis oculi m.
- Corrugator supercilii m. - Procerus m. - Nasalis m - Levator labii superioris alaeque nasi |
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Parts of orbicularis oris muscle and their functions??
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1. Orbital - Closure of opening to eye
2. Palpebral - blink reflex 3. Lacrimal - Not understood, maybe expand lacrimal sac |
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Facial expression of orbicularis oris?
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Worry & concern - but also reflects true happiness when eye muscle is contracted together with mouth muscles drawn back &upwards
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Location orbital part of orbicularis oris?
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Circulary around orbit - attached to:
palpebral ligament frontal maxilla corrugator supercilii Frontal belly of occipitofrontalis |
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Location of palpebral part of orbicularis oris?
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On eyelids & extend to palpebral ligament
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Location of lacrimal part of orbicular is oris?
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Horner´s muscle.
Medial to palpebral ligament from posterior lacrimal crest |
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Corrugator supercilii: OIFExp?
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O: Glabella
I: Radiate into skin of eyebrows, penetrate orb.oris & front.belly of occipitofrontalis F: Protect agains bright light - reflect sympathetic pain. Exp: Thinker brow |
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Procerus muscle; OIF?
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O: Dorsum of nose
I: Skin of forehead F: Menacing (to express danger) expression |
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2 parts of nasals muscle?
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Transverse & alar nasi
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OI of nasal muscle?
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Alveolar edges of canine tooth to skin of nose
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Transverse nasal muscle?
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Goes from midline flat tendon of nose "downhill" to sides
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Alar part of nasal muscle?
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Radiates into skin of nasal "wing"
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Function and expression of nasal muscle?
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F: Contraction pull nasal wing downwards, backwards & reduce size of nostril
Exp: Happy, astonished, desiring & sensuousness |
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Levator labii superioris alaeque nasi; OIFExp?
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O: Infraorbital margin
I: Skin of upper lip & nasal wing F: Elevate nasal wing, raise upper lip Exp: Disgust, displeasure, discontent |
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Muscles of mouth region?
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- Orbicularis oris
- Buccinators - Zygomaticus major (- Zygomaticus minor) - Risorius - Levator labii superioris - Levator anguli oris - Depressor anguli oris - Depressor labii inferioris - Mentalis |
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All facial muscles are innervated by?
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Facial nerve
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Parts of orbicular is oris?
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4 parts:
- Inner labial - Outer marginal (sup/inf ofc.) |
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Function & expr. orbicularis oris?
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Sucking shape, contraction of lips
Expr: Reserved |
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Buccinator; OIF?
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O: 1 & 2nd molars in mandible region & pterygopalatine raphe
I: Angle of mouth (modulus) F: Pulls angle of mouth laterally. Enable air to be blown out. Exp: Satisfaction |
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Zygomaticus major; OIF?
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O: Zygomatic bone
I: Modulus F: Lift angle of mouth up&lateral Exp: Laughter/pleasure |
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Risorus; OIF?
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O: Masseteric fascia
I: Modulus of mouth F: Produce nasolabial fold (with z.major) Exp: Action expression |
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Levator labii superioris; OIF?
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O: Infraorbital margin
I: Skin of upper lip F: Same as levator labii superioris alaeque nasi |
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Levator anguli oris; OIF?
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O: Below infraorbital foramen
I: Modulus of mouth F: Lift angle of mouth Exp: Self confidense |
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Depressor anguli oris; OIF
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O: Lower margin of mandible
I: Modulus of mouth F: Pulls angle of mouth downwards Exp: Sadness |
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Depressor labii inferioris; OIF?
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O: Mandible below mental foramen
I: Skin of lower lip F: Pull lower lip down Exp: Perseverance (stable action course thus obstacles) |
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Mentalis; OIF?
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O: Mandible at level lateral incisors
I: Skin of the chin F: Produce a chin-lip fold Exp: Doubt & indesicion |
