CN V
The maxillary nerve exits the cranial cavity at a foramen labelled. Name the foramen.
Foramen rotundum
What are the two branches given off by the main trunk of the mandibular nerve before it divides?
Meningeal branch → sensory
Nerve to medial pterygoid → motor
What does the inferior alveolar nerve supply?
Sensory to lower teeth
Gives rise to mental nerve (chin & lower lip)
What is CN VII?
Facial nerve
Name the branches given off by the facial nerve within the facial canal.
Greater petrosal nerve
Nerve to stapedius
Chorda tympani
The terminal branch of the maxillary division is named what?
Infraorbital nerve
Into what two divisions does the mandibular nerve split?
Anterior division (mostly motor)
Posterior division (mostly sensory)
Which motor nerve arises from the inferior alveolar nerve?
Nerve to mylohyoid
Supplies:
Mylohyoid
Anterior belly of digastric
Through which foramen does the facial nerve enter the petrous temporal bone?
Internal acoustic (auditory) meatus
What fibres are carried by the greater petrosal nerve?
Preganglionic parasympathetic fibres
(to lacrimal & nasal glands)
Through what foramen does the Infraorbital nerve pass on its route to the face?
Infraorbital foramen
Name the branches of the anterior division of the mandibular nerve.
Masseteric nerve
Deep temporal nerves
Nerve to lateral pterygoid
Buccal nerve
What does the lingual nerve supply?
General sensation to anterior 2/3 of tongue
(taste comes from chorda tympani — CN VII)
Through which foramen does the facial nerve exit the temporal bone?
Stylomastoid foramen
What fibres are carried by the nerve to stapedius?
Motor fibres
(to stapedius muscle)
What type of innervation does the maxillary nerve supply?
GSA
Which branch of the anterior division is sensory?
Buccal nerve (cheek skin & mucosa)
This is the only sensory nerve in the anterior division.
Which foramen do CN VII and CN VIII enter together?
Internal acoustic meatus
List the modalities conveyed by the facial nerve (CN VII).
SVE – motor to muscles of facial expression
GVE – parasympathetic (lacrimal, submandibular, sublingual glands)
SVA – taste from anterior 2/3 of tongue
GSA – sensation from external ear
What fibres are carried by the chorda tympani?
Preganglionic parasympathetic fibres (to submandibular & sublingual glands)
Taste fibres (anterior 2/3 of tongue)
Which nerve supplies the TMJ, external auditory meatus, and skin of ear?
Auriculotemporal nerve
Name the branches of the posterior division of the mandibular nerve.
Inferior alveolar nerve
Lingual nerve
Auriculotemporal nerve
What canal does the facial nerve run in within the petrous temporal bone?
Facial canal
Which cranial nerve carries four different modalities including motor, parasympathetic, taste, and sensation?
Facial nerve (CN VII)
Where is the geniculate ganglion locate and what does it contain?
Within the facial canal and Cell bodies of first-order sensory neurons