Muscles of the Head Flashcards
(28 cards)
Occipitofrontalis:
Occipital Belly
O: Highest nuchal line of occipital bone
I: Epicranial aponeurosis
N: Facial Nerve
A: Moves scalp on skull and raises eyebrows
Occipitofrontalis:
Frontal Belly
O: Skin and superficial fascia of eyebrows
Orbicularis Oculi:
Palpebral part
O: Medial palpebral ligament
I: Lateral palpebral raphe
N: Facial Nerve
A: Closes eyelids and dilates lacrimal sac
Orbicularis Oculi:
Orbital part
O: Medial palpebral ligament and adjoining bone
I: Loops return to origin
N: Facial nerve
A: Throws skin around orbit into folds to protect eyeball
Corrugator Supercilii
O: Superciliary arch
I: Skin of eyebrow
N: Facial nerve
A: Vertical wrinkles of forehead, as in frowning
Compressor nassi
O: Frontal process of maxilla
I: Aponeurosis of bridge of nose
N: Facial nerve
A: Compresses mobile nasal cartilages
Dilator naris
O: Maxilla
I: Ala of nose
N: Facial nerve
A: Widens nasal aperture
Procerus
O: Nasal bone
I: Skin between eyebrows
N: Facial nerve
A: Wrinkles skin of nose
Orbicularis Oris
O: Maxilla, mandible, and skin
I: Encircles oral orifice
N: Facial nerve
A: Compresses lips together
Levator labii superioris alaeque nasi
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, dilates the nostril, elevates the wing of the nose and the upper lip
Levator labii superior
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, elevates upper lip, exposes maxillary teeth
Zygomaticus minor
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, pulls the upper lip backward, upward, and outward, aids in deepening and elevating the nasolabial sulcus
Zygomaticus major
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, lift the angle of the mouth upwards and laterally
Levator anguli oris
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, lifts the angle of the mouth
Risorius
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, retracts/pulls the angle of the mouth laterally
Depressor anguli oris/Triangularis
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, draws the corner of the mouth downward and laterally
Depressor labii inferioris
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, draws lower lip downward and laterally
Mentalis
O: Arise from bones and fascia around oral aperture and insert into substance of lips
N: Facial nerve
A: Separate lips, raises lower lips and produces small wrinkles in the chin
Buccinator
O: Outer surface of alveolar margins of maxilla and mandible and pterygomandibular ligament
N: Facial nerve
A: Compresses cheeks and lips against teeth
Platysma
A: Draws up skin of the superior chest and neck
Masseter
O: Zygomatic arch
I: Lateral surface 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 mandible
N: Mandibular division of trigeminal nerve
A: Anterior and superior fibers elevate mandible; posterior fibers retract mandible
Lateral pterygoid (two heads)
O: Greater wing of sphenoid and lateral pterygoid plate
I: Neck of mandible and articular disc
N: Mandibular division of trigeminal nerve
A: Pulls neck of mandible forward
Medial pterygoid (two heads)
O: Tuberosity of maxilla and lateral pterygoid plate
I: Medial surface of angle of mandible
N: Mandibular division of trigeminal nerve
A: Elevates mandible
