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40 Cards in this Set

  • Front
  • Back
What are the surfaces of the Maxilla? Processes?
Surfaces - Orbital, Base, Infratemporal, Facial

Process - Alveoli, Zygomatic, Frontal, Palatine
Largest and strongest bone of the face
Foramen of the anterior view of face
Zygomaticofacial (zygomatic)
Infraorbital (Msxilla)
Mental (Mandible)
Supraorbital (Frontal)
Processes of the mandible & attachments
Coronoid - temporalis muscle
Condyloid - TMJ (posterior ball)
Only synovial joint of face
Newborn vs. Adult
1) volume (1/8 vs. 1/3)
2) alveolar processes underdeveloped (no teeth)
3) paranasal sinuses small/absent
4) no mastoid process (takes 2 years)
Surfaces of the maxillary sinus (paranasal sinus)
Facial, Orbital, Infratemporal Surfaces
Purpose/function of an air sinus
Allows resonance of voice, lightens skull
What is the largest air sinus?
What is the cause of facial nerve palsy
Compression of facial nerve in newborn by pinching that area of the skull - due to lack of mastoid process
Characteristics of facial muscles? Embryological origin? Innervation?
-Skeletal, arise from bones & insert on skin, express emotion, highly developed
-2nd Pharyngeal Arch
-Cranial Nerve VII
What type of fibers innervate all muscles derived from pharyngeal arches?
Frontalis- association, origin, insertion, action
-associated w/ scalp
-originates from epicranial aponeurosis
-inserts into eyebrows
-raise eyebrows
Orbicularis oculi- parts
palpebral & orbital
Orbicularis oculi (palpebral part) - location, function
-inner portior (thinner/delicate)
-used in blinking (important for keeping cornea lubricated evenly which prevents ulcerations), sleeping, light closure
Orbicularis oculi (orbital part) - location, origin, function
-outer portion, stronger/thicker portion
-originates from medial margin of orbit/medial palpebral ligament
-forceful closing of the eye for protection (windstorm)
Platysma - characteristics, insertion, function
-very large, very thin, lies in superficial fascia
-inserts in corner of mouth and lower border of mandible
-helps draw lower corner of mouth to express fright
What are the muscles of the mouth?
Orbicularis oris, levator anguli superioris, levator labii superioris, depressor anguli inferioris, depressor labii inferioris, buccinator, zygomaticus major, zygomaticus minor, mentalis
What muscle does the parotid duct pierce?
Buccintor - origin/insertion
Alveolar processes of mandible and maxilla/ blends in with fibers of obicularis oris
Buccinator - fibrous origin
Pteryomandibular raphe
What is a raphe?
Tendinous intersection between two msucles
What does the Pterygomandibular raphe separate?
Buccinator from the superior constrictor muscle of the pharynx
Action of buccinator
Blowing, whistling, smiling, compressing cheek (keeps bolus of food between teeth and prevents lodging in vestibule)
Is the buccinator a muscle of mastication?
Not a muscle of mastication, a muscle of facial expression
What is the motor nerve of the face
Facial nerve
Course of facial nerve
Leaves brain, posterior cranial fossa, petrous portion of temporal bone through the internal auditory meatus
What travels with the facial nerve in the internal accoustic meatus
Vestibulocochlear nerve (CN VIII)
Where does the facial nerve leave the skull
Emerges on the base of the skull in the stylomastoid foramen
What are the two branches of the facial nerve as it leaves the skull
After stylomastoid foramen, splits into Posterior auricular nerve and Nerve to stylohyoid and digastric muscles
What does posterior auricular nerve innervate
occipitalis (facial muscle in the back)
Where does facial nerve go after splitting off the two branches (posterior auricular and stylohyoid/digastric nerve)
Sinks into parotid gland
Five branches of Facial after parotid gland
Two Zebras Bit my Cock
Temporal, Zygomatic, Buccal, Marginal Mandibular, Cervical
What does the temporal branch innervate
Frontalis and superior part of the orbicularis oculi
What does the Zygomatic branch innervate?
Crosses zygomatic arch, innervates inferior part of orbicularis oculi and zygomaticus muscles
What does the buccinator nerve innervate?
Crosses the masseter muscle and innervates the buccinator and orbicularis oris
What does the Marginal Mandibular branch innervate?
Runs along the margin of the mandible to innervate the muscles of the lower lip and chin
What nerve is in danger with submandibular surgery?
The marginal mandibular nerve can dip below the mandible and if cut, can paralyze muscles.
What does the cervical branch innervate?
Bell's palsy - description, which muscles are paralyzed, symptoms, causes
Ipsilateral (same side) facial paralysis of levator anguli oris, and zygomatic major, buccinator cant keep food out of vestibule, drooling, cant shew, cant close eyes, tears always coming out of eyes, cause unknown but may be due to inflamed facial nerve as it traverses temporal bone