Trigeminal Nerve Flashcards
what does the sensory root of the trigeminal nerve innervate?
skin of face, oral, nasal and sinus, mucosa and teeth
what does the motor root of the trigeminal nerve innervate?
muscles of mastication and 3 other muscles
what are the 3 divisions of the trigeminal nerve
ophthalmic, maxillary and mandibular
what are the 3 foramen involved with the trigeminal nerve?
mental foramen/ mandibular foramen , infraorbital foramen, supraorbital foramen
what bones form the hard palate
palatine process of maxilla and horizontal plate of palatine bone
where does the trigeminal nerve emerge from on the brainstem?
mid pons
where do the sensory nerves of the trigeminal nerve emerge from?
mid pons, mid brain and medulla
what does the mesencephalic nucleus on the sensory nerve innervate?
proprioception
what does the chief sensory nucleus on the sensory nerve innervate?
discriminative touch
what does the spinal nucleus on the sensory nerve innervate?
pain and temperature
where does the trigeminal ganglion lie?
the petrous temporal bone in a cave of dura mater (Meckels cave)
what does CN V1 pass through?
superior orbital fissure
what does CN V2 pass through
foramen rotundum
what does CN V3 pass through
foramen ovale
what are the divisions of CN V1 (ophthalmic divisions)
frontal nerve -> supraorbital and supratrochlear, lacrimal nerve, nasociliary nerve, infratrochlear nerve
what does the ophthalmic nerve supply?
sensory to skin of vertex and upper eyelid and forehead
what do the supratrochlear and lacrimal nerve and supraorbital nerves supply?
vertex, forehead and upper eyelids
what does the infratrochlear nerve supplies?
skin at medial angle of eye and adjacent root of nose
what supplies the tip of the nose?
external nasal branch by anterior ethmoidal branch of nasociliary branch of CN V1
what branch of the trigeminal nerve reaches the pterygopalatine fossa?
CN V2
what does CN V2 innervate?
lateral forehead, zygomatic region, lower eyelid, side of nose, cheek, upper lip
what are the alveolar branches of CN V2
posterior superior alveolar, middle superior alveolar, anterior superior alveolar
what are the palatine branches of CN V2
greater and lesser palatine nerves
what is the upper gingivae supplied by?
nasopalatine nerve and greater palatine nerve and superior alveolar nerve
what is the soft palate supplied by?
lesser palatine nerve
what are the branches of CN V2
zygomatic nerve, infra-orbital nerve, palatine nerves, superior alveolar nerve
what are the boundaries of the infratemporal fossa?
ramus of mandible, lateral pterygoid plate of sphenoid bone, posterior aspect of maxilla, tympanic plate, mastoid and styloid processes, infratemporal crest of sphenoid bone, angle of mandible
what are the 3 parts of the mandibular division?
main trunk, anterior trunk and posterior trunk
what is in the main trunk of CN V3
meningeal branch, branch to tensor tympani, branch to tensor veli palatini, nerve to medial pterygoid
what is in the anterior trunk of CN V3
deep temporal nerves, nerve to lateral pterygoid, long buccal nerve, masseteric nerve
what is in the posterior trunk of CN V3
auriculotemporal nerve, lingual nerve, inferior alveolar nerve
what is the sensory nerve supply to oral cavity?
buccal nerve to cheek and lateral gum
IAN to lower teeth, skin and lower lip
what does the inferior alveolar nerve give motor innervation to?
mylohyoid and anterior belly of digastric
