Cranial Nerves Flashcards
What is the name for cranial nerve VI?
Abducent nerve
What cranial nerve number is the oculomotor nerve?
CN III
What is the name of cranial nerve VIII?
Vestibulocochlear nerve
What is the name of cranial nerve XII?
Hypoglossal nerve
Which cranial nerve number is glossopharyngeal nerve?
CN IX
The ___ is CN X and ____ is CN XI.
Vagus
Accessory
What cranial nerve number is the facial nerve?
VII
True/False. The trochlear nerve is CN IV and the trigeminal nerve is CN V.
True
What nerve is CN I?
Olfactory nerve
Which nerve is CN II?
Optic nerve
Which nerve has both motor and sensory fibers and emerges through the stylomastoid foramen?
Facial nerve (CN VII)
Which nerve has a dorsal branch that supplies motor innervation to the trapezius muscle and cleidocephalicus muscle?
Accessory nerve (CN XI)
Where is the olfactory nerve found within the ethmoid bone?
Ethmoidal conchae and the cribiform plate
Which nerves innervate the extrinsic muscles of the eye?
Oculomotor nerve
Trochlear nerve
Abducent nerve
What nerves make up BLIMA?
Buccal Lingual Inferior alveolar Mylohyoid Auriculotemporal
Which nerve is the sensory component to the medial canthus?
Opthalmic nerve/ branch
which nerve is the sensory component to the lateral canthus?
Maxillary nerve/branch
Which nerves come out of the tympano-occipital fissure?
Glossopharyngeal (IX)
Vagus (X)
Accessory (XI)
Which nerve can you find associated with the internal acoustic meatus on a sagitally sectioned skull?
Vestibulocochlear (VIII)
The facial nerve trunk lies deep to the _____ and emerges from the ____ caudal to the base of the ear.
Parotid salivary gland; styomastoid foramen
Various branches of the facial nerve supply motor innervation to ___, ___, and the caudal part of the ____ muscles
Stylohyoideus m., caudal auricular muscles, and digastricus muscle
What muscle does the mandibular branch of the trigeminal nerve supply motor innervation?
Cranial part of the digastricus muscle
Are the auriculopalpebral and buccal branches of the facial nerve motor or sensory?
Motor
What do the branches of the auriculotemporal nerve unit with?
- Dorsal buccal branch of the facial nerve
- Auriculopalpebral branch of the facial nerve
True/False. The mental nerve is a branch off the maxillary nerve.
False. It comes from the mandibular branch of the trigeminal nerve
Which nerve is mostly sensory but provides motor fibers to the mylohyoid muscle and muscles of mastication?
CN V - Trigeminal nerve
Which nerve has fibers that leave the fundus of the eye at the optic disk and enter the cranium via the optic foramen?
CN II - Optic nerve
Where does the hypoglossal nerve (CN XII) exit the cranium through and what does it supply?
Hypoglossal foramen; motor to the tongue
What kind of nerve is CN IX and what does it innervate?
Mixed nerve (sensory/motor); innervates pharynx and tongue
What does the cranial laryngeal nerve provide motor and sensory fibers to?
Motor- cricothyroid muscle
Sensory- laryngeal mucosa
Which of the following arteries has an extra-cranial portion that regresses in the feline and bovine?
a. External carotid a.
b. Internal carotid a.
c. Occipital a.
d. All the above
b. Internal carotid a.
Which branch off the Maxillary artery accompanies a nerve through the mandibular canal?
Inferior alveolar artery and nerve
What artery supplies structures within the periorbita?
External opthalmic artery
What supplies the lower arcade of teeth and inferior labia via. the mental arteries?
Inferior alveolar artery
What is the major blood supply to the hard palate?
Major palatine artery
Which of the following is FALSE regarding the infraorbital artery?
a. Its the continuation of the maxillary artery after it passes the maxillary canal
b. It supplies the alveoli of the upper teeth
c. It supplies the superficial nasal region after it emerges through the infraorbital foramen
d. All the above are true
a. Its the continuation of the maxillary artery after it passes the maxillary canal
- There is no maxillary canal its the maxillary FORAMEN
Where does the maxillary branch of CN V exit before it enters the maxillary foramen?
Rostral alar foramen
What passes through the mandibular canal?
Inferior alveolar artery, and vein
Inferior alveolar nerve of the mandibular nerve of CN V
The inferior alveolar artery is a branch of ____ artery, while the inferior alveolar nerve is a branch off ____ nerve.
Maxillary artery ;Mandibular nerve
In which animals is the orbitorotundum foramen present?
Pigs and ruminants
Which nerves pass through the orbitorotundum foramen?
Maxillary nerve of CN V Opthalmic nerve of CN V Oculomotor nerve (CN III) Trochlear nerve (CN IV) Abducent nerve (CN VII)
Which nerve is seen passing through the oval foramen in the dog and ruminant?
Mandibular nerve of CN V
Which nerve passes through the round foramen and opens into the alar canal in the dog and horse?
Maxillary nerve of CN V
Cranial Nerve XI found within what foramen?
Magunum foramen
Which nerves are considered to be “purely” sensory and which are considered to be “purely” motor?
Sensory: CN I, II, VIII
Motor: CN III, IV, VI, XI, XII
True/False. Glossopharyngeal nerve is only considered a sensory nerve.
False. Its a mixed nerve and its both motor and sensory
What are the somatic and visceral constituents of the glossopharyngeal nerve?
Somatic: stylopharyngeus muscle
Visceral: parotid and zygomatic salivary glands
What are the nerves that contain autonomic (PSNS) components?
CN III, VII, IX, and X
True/False. The maxillary artery courses rostral to the TMJ before entering the alar canal via the caudal alar foramen.
True.
The auriculotemporal nerve is a branch off the _____ nerve, while the auriculopalpebral nerve is a branch off the ____ nerve.
Trigeminal nerve
Facial nerve
Which nerve’s autonomous zone is the medial canthas of the eye?
Opthalamic branch of the Trigeminal nerve
Which of the following is an intrinsic muscle of the eye and will constrict the pupil via the ciliary ganglion?
a. Optic nerve
b. Trochlear nerve
c. Oculomotor nerve
d. Abducent nerve
c. Oculomotor nerve
What are the afferent and efferent nerves of the menace response?
Afferent: CN II - Optic Nerve
Efferent: CN III - Oculomotor nerve
Which nerve is damaged if you see a lateral strabismus, and droopy upper eyelid?
Oculomotor nerve
What muscles does the facial nerve provide motor fibers to?
Caudal belly of the digastricus muscle
Muscles of facial expression
What nerve innervates the retractor bulbi muscle and lateral rectus muscle?
Abducens nerve - CN VI
Which nerve innervates the tongue (motor component)?
Hypoglossal nerve CN XII
Which nerves are involved in the palpebral reflex of the lateral canthus?
Afferent: Maxillary branch of the CN V
Efferent: Facial nerve- CN VII
Which nerves are involved in the sensation of taste to the tongue?
Rostral 2/3 –> Facial nerve (VII)
Caudal 1/3 –> Glossopharyngeal nerve (IX)
Which nerve will innervate the dorsal oblique muscle?
Trochlear nerve (IV)
What muscles does the Oculomotor innervate?
DVM (dorsal, ventral and medial) rectus
Ventral rectus
Levator palpebrae superioris muscles
Which nerve is damaged if you see an oblique deviation of the pupil?
Trochlear nerve
What are the afferent and efferent nerves involved in the palpebral reflex of the medial canthus?
Afferent: Opthalmic branch of CN V.
Efferent: Facial nerve - CN VII
Which nerves are involved in the sensation of touch to the tongue?
Rostral 2/3 –> Mandibular branch of V (specifically lingual)
Caudal 1/3 –> Glossopharyngeal nerve (IX)
What would you see if the abducens nerve was lesioned?
Medial strabismus
What lesions would you see if the Vestibulocochlear nerve was lesioned?
Nystagmus
Head tilt
Circling
Balance problems
What nerves are part of the gag reflex?
Vagus nerve
Glossopharyngeal nerve
