Muscles Of The Head Flashcards
(25 cards)
Occipitofrontalis
-frontalis belly
O: galea aponeurotica
I: skin above eyebrow
N: facial nerve
A: RAISES EYEBROW
Occipitofrontalis muscle
-occipital belly
O: galea aponeurotica
I: superior nuchal line of occipital bone
N: facial nerve
A: MOVES SCALP ON SKULL
Muscles of facial expression
Orbicularis oculi Corrugator supercilii Compressor nasi Dilator naris Procerus Orbicularis ori
Corrugator supercilii
O: Superciliary arch (superomedial angle of orbital origin)
I: skin of half eyebrow
N: temporal branch of FACIAL NERVE
A: VERTICAL WRINKLES OF FOREHEAD, AS IN FROWNING
Compressor nasi
O: frontal process of maxilla
I: aponeurosis of bridge of nose
N: buccal branch of FACIAL NERVE
A: COMPRESSES MOBILE NASAL CARTILADGE
Dilator naris
O: maxilla
I: ala of nose
N: BUCCAL BRANCH OF FACIAL NERVE
A: WIDENS NASAL APERTURE
Procerus
O: inferior ends of the nasal bone
I: skin between eyebrow
N: buccal branch of FACIAL NERVE
A: WRINKLES SKIN OF NOSE
Orbicularis ori
O: maxilla, mandible and skin
I: encircles oral orifice
N: BUCCAL BRANCH OF FACIAL NERVE
A: COMPRESSES LIPS TOGETHER
Dilator muscle of lips
Levator labii superioris alaeque nasi Levator labii superioris Zygomaticus minor Zygomaticus major Levator anguli oris Risorius Depressor anguli oris Depressor labii inferioris Mentalis Buccinator Platysma
Levator labii superioris alaeque nasi
Angular head
O: upper part of frontal process of maxilla
I: into greater alar cartilage, skin of nose, lateral upper lip
N: zygomatic and buccal branch of facial nerve
A: elevates upper lip and dilates nostrils
ZYGOMATICUS MUSCLES
O: zygomatic arch
I: angle of mouth
N: zygomatic and buccal branch of facial nerve
A: minor-elevates upper lip
Major: draws angle of mouth backwards and upward
Levator labii superioris
O: infra-orbital margin
I: skin of upper lip
N: buccal branch of facial nerve
A: separates lips
Levator anguli oris
O: canine fossa
I: angle of mouth
N: BUCCAL BRANCH OF FACIAL NERVE
A: SEPARATES LIPS
Risorius
O: parotid fossa
I: angle of mouth
N: BUCCAL BRANCH OF FACIAL NERVE
A: SEPARATES LIPS
Depressor anguli oris
O: anterolateralbase of mandible
I: angle of mouth
N: MANDIBULAR BRANCH OF FACIAL NERVE
A: SEPARATES LIPS
Depressor labii inferioris
O: margin of lower lip
I: skin of lower lip
N: MANDIBULAR branch of facial nerve
A: separates lips
Mentalis
O: symphysis menti
I: skin of chin
N: MANDIBULAR branch of facial nerve
A: ELEVATES AND PROTRUDES LOWER LIP; elevates skin of chin
Buccinator
O: lateral surface of the alveoli of both the maxilla and mandible
I: angle of mouth
N: BUCCAL BRANCH OF FACIAL NERVE
A: PRESSES CHEEKS AGAINST TEETH, SUCKLING ACTIONS, POUTING AND PLACING FOOD BET. MOLAR
Platysma
O: skin below clavicle, upper thorax
I: mandible, oral muscles
N: facial nerve
A: tenses skin of neck
Muscles of mastication
Masseter
Temporalis
Lateral pterygoid
Medial pterygoid
Masseter
O: zygomatic arch
I: lateral surface of Ramus of mandible
N: MANDIBULAR DIVISION OF TRIGEMINAL NERVE
A: ELEVATES MANDIBLE TO OCCLUDE TEETH
Temporalis
O: floor of temporal fossa
I: coronoid process of manidible
N: MANDIBULAR DIVISION OF TRIGEMINAL NERVE
A: ANTERIOR AND SUPERIOR FIBERS ELEVATE MANDIBLE, POSTERIOR FIBERS RETRACT MANDIBLE
Lateral pterygoid
O: greater wing of sphenoid and lateral pterygoid
I: neck of mandible and articular sac
N: MANDIBULAR DIVISION IF TRIGEMINAL NERVE
A: PULLS NECK OF MANDIBLE FORWARD
Medial pterygoid
O: tuberosity of maxilla and lateral pterygoid plate
I: medial surface of angle of mandible
N: MANDIBULAR DIVISION OF TRIGEMINAL NERVE
A: ELEVATES MANDIBLE
