LA Anatomy Flashcards
where does the trigeminal nerve divide into its three main branches
three divisions arise from the trigeminal ganglion which is situated in the middle cranial fossa of the skull (temple area)
how does the opthalmic division exit the middle cranial fossa and where does it travel next
via the superior orbital fissure and travels to the orbit
how does the maxilliary division exit the middle cranial fossa and where does it travel next
via the foreamen rotundum and travels to the pterygopalatine fossa
how does the mandibular division exit the middle cranial fossa and where does it travel next
via the foreamen ovale and travels to the infratemporal fossa
for each division of the trigeminal nerve does it carry sensory or motor fibres
opthalmic - sensory
maxillary - sensory
mandibular - sensory and motor
what does the opthalmic division supply
sensory innervation to forehead, scalp , cornea, upper eyelid
what does the maxillary division supply
sensory innervation to cheeks, sides of nose, upper lip , hard and soft palates, maxillary teeth and gingiva
what does the mandibular division supply
sensory innervation to lower lip , chin , mandibular teeth and tempoauricular area
motor innervation to the muscles of mastication and mylohyoid muscle
what are the three main branches of CN V1
frontal , lacrial and nasocilliary
what branch of CN V2 branches before exiting the cranium
meningeal nerve - supplies dura mater
zygomatic nerve
branch of CN V2
supplies sensory innervation to orbit
enters orbit via inferior orbital fissure
infraorbital nerve
branch of CN V2
enters orbit via inferior orbital fissure then leaves skull to exit face via infraorbital foreamen
supplies part of upper lip , lower eye and sides of nose
also gives off middle superior alveolar nerve and anterior superior alveolar nerve which supply pre molars and their gingiva and canines and incisors + gingiva respectively
posterior superior alveolar nerve
branch of CN V2
supplies sensory innervation to molars and their gingiva
nasopalatine nerve
branch of CN V2 pterygopalatine ganglion
exits via incisive foramen
supplies anterior hard palate
greater palatine nerve
branch of CN V2 pterygopalatine ganglion
supplies posterior hard palate
lesser palatine nerve
branch of CN V2 pterygopalatine ganglion
supplies soft palate and uvulva
nasopharyngeal nerve
branch of CN V2 pterygopalatine ganglion
supplies nasopharynx
anterior division of CN V3
mainly motor fibres
consists of….
- deep temporal nerve (supplies temporalis) motor
- nerve to lateral pterygoid (lateral pterygoid) motor
- masseteric nerve (supplies masseter) motor
- buccal nerve (sensory to cheek and mandibular molar gingiva)
inferior alveolar nerve
branch of CN V3
first branch = nerve to mylohyoid , motor innervation to mylohyoid muscle and anterior belly of digastric
then enters mandible via mandibular foramen
supplies sensory innervation to lower teeth and gingiva
then exits mandible via mental foramen as mental nerve which supplies sensory innervation to chin and lower lip
lingual nerve
Branch of CN V3
provides sensory innervation to anterior 2/3 of tongue , lingual gingiva and floor of the mouth
chorda tympani from CN VII travels with the lingual nerve it carries sensory afferents to receive taste from ant 2/3 of tongue and also parasympathetic fibres to the submandibular and sublingual glands
auriculotemporal nerve
branch of CN V3
supplies sensory innervation to that region of face
nerve to medial pterygoid
branch of CN V3
motor innervation to medial pterygoid muscle
what nerve supplies parasympathetic innervation to the submandibular and sublingual glands
chorda tympani branch of facial nerve
runs alongside lingual nerve of CN V3
where does the facial nerve exit the skull
stylomastoid foramen
what are the 5 main motor branches of the facial nerve
temporal zygomatic buccal marginal mandibular cervical
what gland does the facial nerve run through
parotid gland
