Nerves of Pharynx Flashcards
What are the three divisions of the trigeminal nerve (CN V)?
Ophthalmic nerve (CN V1)
Maxillary nerve (CN V2)
Mandibular nerve (CN V3)
Name nerve A.
Ophthalmic nerve (CN V1)
Name nerve B.
Maxillary nerve (CN V2)
Name nerve C.
Mandibular nerve (CN V3)
Name nerve D.
Glossopharyngeal nerve (CN IX)
Name nerve E.
Hypoglossal nerve (CN XII)
Name structure F.
Superior sympathetic ganglion
Name nerve G.
Vagus nerve (CN X)
Name nerve H.
Spinal accessory nerve (CN XI)
What is the origin of the ophthalmic nerve?
Trigeminal ganglion
Describe the course of the ophthalmic nerve.
Runs anteriorly through cavernous sinus, passes into orbit via superior orbital fissure.
What structures are supplied by the ophthalmic nerve?
Skin of upper face
Portions of nose and nasal cavity
Eye, conjunctiva
Membranes of frontal, sphenoid, ethmoidal paranasal sinuses
What type of nerve is the ophthalmic nerve?
Sensory
What is the origin of the maxillary nerve?
Trigeminal ganglion
Describe the course of the maxillary nerve
Anteriorly through cavernous sinus
Passes pterygopalatine fossa via foramen rotundum
What type of nerve is the maxillary nerve?
Sensory
Describe the structures supplied by the maxillary nerve.
Skin of middle face
Portions of nose and nasal cavity
Orbit
Sphenoid sinus
Maxillary sinus
Maxillary teeth
What is the origin of the mandibular nerve?
Trigeminal ganglion
Describe the course of the mandibular nerve
Runs inferiorly through the foramen ovale and into infratemporal fossa.
Describe the sensory structures supplied by the mandibular nerve
Skin of anterior ear, cheek, lower face, lips
Mucosa of cheeks and floor of oral cavity
Anterior two thirds of tongue
Teeth of mandible
Temporomandibular joint
Describe the motor structures supplied by the mandibular nerve
Muscles of mastication
Tensor tympani
Tensor veli palatini
Mylohyoid
Anterior digastric muscles
What type of nerve is the maxillary nerve?
Sensory and motor
What is the origin of the glossopharyngeal nerve?
Medulla oblongata of brainstem
Describe the course of the glossophryngeal nerve.
Laterally from brainstem to jugular foramen
Emerges below skull
Passes between internal jugular vein and internal carotid artery
Wraps around stylopharyngeus muscle
Terminates into branches between superior and middle pharyngeal constrictors
What type of innervation is supplied by the glossopharyngeal nerve?
Parasympathetic, sensory, motor
Describe the structures that are provided parasympathetic innervation by the glossopharyngeal nerve.
Parotid gland
Describe the structures that are provided motor innervation by the glossopharyngeal nerve.
Stylopharyngeus muscle
Describe the structures that are provided sensory innervation by the glossopharyngeal nerve.
Tympanic cavity, auditory tube
Oropharynx
External ear
Posterior third of tongue
Carotid body
Carotid sinus
