Lecture 6- The Trigeminal Nerve Flashcards
What are the two resident nerve fiber types of CN V?
GSA (face)
SVE (muscles of the 1st arch)
What are the acquired fiber types of CN V?
SA (taste)
GVE (parasympathetics to smooth muscle and glands)
What are the 3 subdivisions of the trigeminal nerve and where does each emerge from the skull?
V1-Ophthlamic- Superior Orbital Fissure
V2- Maxillary- Foramen rotundum
V3- Mandibular- Foramen ovale
Where is the trigeminal ganglion located?
Trigeminal impression (Meckel’s Cave)
Which branches of the trigeminal nerve pass through the cavernous sinus?
V1, V2
What are the 4 main branches of the ophthlamic nerve (V1)?
Meningeal (tentorial) nerve
Frontal nerve
Lacrimal nerve
Nasociliary nerve
What are the two branches of the frontal nerve?
supraorbital nerve
supratrochlear nerve
What are the 5 branches of the nasociliary nerve?
sensory root to ciliary ganglion long ciliary nerves posterior ethmoidal nerve anterior ethmoidal nerve infratrochlear nerve
What are the 2 branches of the anterior ethmoidal nerve?
internal and external nasal branches
Which branch of CN V carries sensory information from the tentorium cerebelli?
V1-Ophthlamic- Meningeal branch
What are the three branches of V1 that traverse the superior orbital fissure?
Frontal nerve
Lacrimal nerve
Nasociliary nerve
What is the nasociliary nerve called after it gives of the poterior and anterior ethmoidal nerves?
infratrochlear nerve
How do the anterior and posterior ethmoidal nerves enter into the ethmoidal air cells?
through the anterior and posterior ethmoidal foramina
where do the anterior and posterior ethmoidal nerves branch from?
Nasociliary nerve
Where do the internal and external nasal branches come from?
the anterior ethmoidal nerve which is a branch of the nasociliary nerve which is part of V1
Which nerve control dilation of the pupil?
Long ciliary nerve (branch of nasociliary from V1)
Which nerve controls the sphincter pupillae?
Short Ciliary nerves form ciliary ganglion from sensory root of nasociliary nerve (V1 branch)
What are the 5 Main branches of V2 that arise in the pterygopalatine fossa?
Zygomatic Nerve
Communicating branches (2) with PPG
Posterior Superior Alveolar Nerve
Infraorbital Nerve
What are the two branches of the zygomatic nerve that arise in the inferior orbital fissure?
Zygomaticofacial
Zygomaticotemporal
Which part of V1 does the Zygomaticotemporal communicate with?
Lacrimal Nerve of V1
Where is the pterygopalatine ganglion suspended from?
V2
What are the 7 branches arising from the pterygopalatine ganglion?
Orbital branches Medial and Lateral posterior superior nasal nerves nasopalatine nerves greater and lesser palatine nerves pharyngeal nerves
How do structures pass from the pterygopalatine fossa into the nasal cavity?
sphenopalatine foramen
Where do the greater and lesser palatine nerves aquire taste fibers from?
Nerve to the pterygoid canal (from VII) joins in pterygopalatine ganglion
What are the 9 main branches of the mandibular nerve V3?
Meningeal branch (nervus spinosus) Nerve to the medial pterygoid Nerve to the lateral pterygoid Deep temporal nerves (anterior and posterior) Masseteric nerve Buccal Nerve (Long buccal nerve) Auriculotemporal nerve Lingual nerve Inferior alveolar nerve
What nerve does the lingual nerve receive? where does it originate from?
Chorda tympani (from CN VII)
What muscular branch arises from the inferior alveolar nerve of V3?
nerve to the mylohyoid
What are the terminal branches of the inferior alveolar nerve?
mental and incisive nerve
What two structures enter the cranial cavity through the foramen spinosum?
middle meningeal artery nervous spinosus (meningeal branch from V3)
What nerve wraps around the middle meningeal artery?
auriculotemporal nerve (branch of V3)
