Trigeminal & Facial Nerves Flashcards
What is the main sensory nerve to the head?
trigeminal N
Trigeminal N is (sensory/motor/mixed).
mixed
Trigeminal N is motor to ___________ and sensory to ________.
muscles of mastication
skin of head
(T/F) The trigeminal nerve is sensory for taste and contains PSNS axons.
False - neither
List the 5 muscles of mastication.
- masseter
- temporalis
- medial pterygoid
- lateral pterygoid
- rostral belly of digastricus
All the muscles of mastication (open/close) the mouth except _______ which (opens/closes) the mouth.
close
rostral belly of digastricus
opens
List the 3 branches of the Trigeminal nerve.
ophthalmic
maxillary
mandibular
The ophthalmic nerve is (motor/sensory/mixed).
sensory (to structures around eye)
What three nerves branch from the ophthalmic nerve?
- lacrimal N
- frontal N
- nasociliary N
The maxillary nerve is (sensory/motor/mixed).
sensory
List the 3 branches of the maxillary nerve.
- cornual branch N
- pterygopalatine N
- infraorbital N
The pterygopalantine nerve splits and supplies most of the nasal cavity via _______, hard palate via _______, and soft palate via _______.
caudal nasal N
major palatine N
minor palatine N
The pterygopalatine N supplies ___________ axons to the lacrimal gland and glands of nasal cavity via ________ to stimulate secretion.
parasympathetic postganglionic
pterygopalatine ganglion
What nerve is sensory to the upper lip and upper teeth?
infraorbital N (branch of maxillary)
The mandibular nerve is (sensory/motor/mixed).
mixed
The mandibular nerve is motor to ______ and sensory to ______.
muscles of mastication
head ventral to facial crest
Which branch of the mandibular N is motor?
masticatory N
_______ N supplies motor innervation to the masseter M.
masseteric N
________ N supplies motor innervation to the temporalis M.
caudal deep temporal N
What are the 4 branches of the mandibular nerve that are sensory?
- buccal N
- auriculotemporal N
- lingual N
- inferior alveolar N
What nerve is sensory to rostral 2/3 of the tongue? Which is sensory to all lower teeth and lower lip?
lingual N
inferior alveolar N
The facial N is (sensory/motor/mixed).
mixed
What is the sensory ganglion of the facial N called?
geniculate ganglion
The facial N is motor to _________ and sensory to ________.
muscles of facial expression
skin of the ear canal
(T/F) The facial N is sensory for taste on the rostral 2/3 of the tongue.
True
The facial N supplies (SNS/PSNS) innervation to what structures?
PSNS
lacrimal gland, mandibular salivary gland, sublingual salivary gland, glands in nasal cavity
What is the only branch of the facial N that is sensory? What is it sensory to?
internal auricular branch
skin of ear canal + taste
List the motor branch of the facial N based on what it innervates:
- cervicoscutularis + cervicoauricularis Mm
- caudal belly of digastricus M
- zygomaticoscutularis & zygomaticoauricularis Mm + orbicularis oculi M
- muscles that move nostrils, lips, cheeks
- muscles that move lower lip & cheek
- cutaneous colli M
- caudal auricular N
- digastric branch
- auriculopalpebral N
- buccal branches
- marginal mandibular branch
- cervical branch
The facial N is referred to as __________ N.
intermediofacial
Term for bundle of axons between facial and vestibulocochlear Nn with axons for taste buds on the rostral 2/3 of the tongue and PSNS to salivary glands.
chorda tympani
If a lip laceration, you need a(n) __________ N block.
infraorbital
If an upper eyelid laceration, you need to block ___________ N to desensitize but ___________ N to paralyze orbicularis oris M.
supraorbital
auriculopalpebral
To remove the eye such as in “cancer eye” in cattle, what two blocks can you use? Which is one injection vs. four?
- peterson eye block (one injection)
- four-point retrobulbar block (4)
