Structures of Mastication Flashcards
dislocation the jaw may occur when mouth is open too wide due to excessive contraction of the __________ muscle
lateral pterygoid
where does the lateral pterygoid muscle insert?
neck of mandible
where does the temporalis insert?
coronoid process of mandible
what goes through the mandibular foramen?
inferior alveolar nerve
where does the medial pterygoid insert?
angle of mandible
what nerve innervates the msucles of mastication (temporalis, masseter, lateral pterygoid, medial pterygoid)?
mandibular division of trigeminal nerve (V3)
what nerve innervates the buccinator?
facial nerve VII
maxillary artery arises from? enters what fossa?
external carotid artery, pterygopalatine
first branch of maxillary artery supply?
cranium, mandible, and ear (middle meningeal and inferior alveolar artery)
second branch of maxillary artery supply?
muscles of mastication
third branch of maxillary artery supply?
upper teeth, infraorbital region, nose, and palate (infraorbital artery, descending palatine arteries)
mandibular division of trigeminal exits cranium by what fossa?
formen ovale
posterior division of mandibular nerve (V3) gives rise to what nerves?
auriculotemporal, inferior alveolar, and lingual nerves
the otic ganglion receives preganglionic __________ fibers from CN IX, and distribute postganglionic fibers to the _______ via the ________ nerve
parasympathetic, parotid gland, auriculotemporal
innervation to the submandibular and sublingual salivary glands from cranial nerve _____
VII, facial nerve
sympathetic innervation for all 3 salivary glands by postganglionic sympathetic fibers from _________, producing _________ in salivary glands
superior cervical ganglion, vasoconstriction
lymphoid tissue of the posterior 1/3 of the tongue?
lingual tonsil
restricted tongue movement is due to a short ________, cut to release
lingual frenulum
intrinsic tongue muscles innervated by?
CN XII, hypoglossal
extrinsic muscles of the tongue?
genioglossus, hyoglossus, styloglossus, and palatoglossus
what muscles helps protrude the tongue?
genioglossus
what muscles helps retract and depress the tongue?
hyoglossus
what muscle retracts and elevates the tongue?
styloglossus
the genioglossus, hyoglossus, and styloglossus are innervated by?
CN XII, hypoglossal
the palatoglossus (exception-extrinisic tongue muscle) is innervated by?
CN X vagus
what muscle elevates the posterior part of the tongue?
palatoglossus
nerve supply to tongue is by what five cranial nerves?
V3, VII, IX, X, XII (mandibular trigeminal, facial, glossopharyngeal, vagus, hypoglossal)
motor supply of tongue muscles provided by? and exception?
CN XII (hypoglossal), exception is palatoglossus by CN X vagus
sensory supply for anterior 2/3 of tongue?
lingual nerve, branch of mandibular trigeminal V3
taster for anterior tongue?
facial nerve VII via chorda tympani
taste and sensation to posterior 1/3 of tongue?
CN IX glossopharyngeal by way of lingual branch
gleeking is due to sudden release of saliva from _______ ducts, contracted by ________ muscle
submandibular, mylohyoid
all muscles of the soft palate (levator palati, palatopharyngeus, and palatoglossus) are innervated by ________ except the tensor palati innervated by ______
vagus nerve, manidbular trigeminal
what muscles tenses the soft palate?
tensor palati, V3
what muscle elevates the soft palate?
levator palati, CN X
what muscles lowers the soft palate and raises pharynx?
palatopharyngeus, CN X
what muscles lowers the soft palate and raises the tongue?
palatoglosssus, CN X
circular breathing when close oral cavity with soft palate, pull air into lungs, contract ______ to keep blowing instrument, then raise ________ while exhaling air from lungs into mouth
buccinator, soft palate
auditory tubes are open when ________ and ______ muscles contract during swallowing
salpingopharyngeus, tensor palatini
lesion of CN ____ will cause uvula to deviate to (affected or unnaffected) side
X vagus, unaffected
