Anatomy III/ Midterm III Past Paper Questions: Cranial Nerves Flashcards
Which nucleus sends parasympathetic fibres to the otic ganglion?
A) motor trigeminal nucl.
B) inf. salivatory nucl.
C) ambiguus nucl
inf. salivatory nucl.
Which of the following is the preganglionic nerve of the pterygopalatine ganglion?
A) chorda tympani
B) lesser petrosal nerve
C) greater petrosal nerve
greater petrosal nerve
The internal branch of the accessory nerve joins the…… nerve.
A) glossopharyngeal
B) femoral
C) vagus
vagus
The external branch of the accessory nerve innervates
A) sternocleidomastoid and trapezius
B) infrahyoid muscles
C) supraspinatus and infraspinatus
sternocleidomastoid and trapezius
What is the fiber composition of chorda tympani?
A) parasympathetic and branchiomotor
B) sympathetic and general somatosensory
C) parasympathetic and special viscerosensory
parasympathetic and special viscerosensory
Otic ganglion is
A) a sympathetic ganglion of facial nerve
B) a parasympathetic ganglion of glossopharyngeal nerve
C) sensory ganglion of vagus nerve
a parasympathetic ganglion of glossopharyngeal nerve
Which nerve gives the sensory innervation of the tympanic cavity?
A) tympanic nerve
B) lesser petrosal nerve
C) accessory nerve
tympanic nerve
(this seems too easy)
Where do the central axons of taste fibres of glossopharyngeal nerve terminate?
A) post. 1/3 of tongue
B) geniculate ganglion
C) solitary nucleus
solitary nucleus
(the peripheral fibers end in the posterior 1/3 of the tongue)
(also, the perikaryon is in the inferior ganglion of CN IX)
Which is the preganglionic nerve of the submandibular ganglion?
A) greater petrosal nerve
B) chorda tympani
C) tympanic nerve
chorda tympani
Where is the cell body of the secretomotor fibres innervating the lacrimal gland?
A) dorsal vagal nucleus
B) pterygopalatine ganglion
C) lateral horn of sacral spinal cord
pterygopalatine ganglion
Where is the cell body of the branchiomotor fibres innervating the laryngeal muscles?
A) ambiguus nucleus
B) solitary nucleus
C) submandibular ganglion
ambiguus nucleus
Where is the cell body of the taste fibres innervating the post. 1/3 of the tongue?
A) solitary nucleus
B) inf. ganglion of glossopharyngeal nerve
C) sup. salivatory nucleus
inf. ganglion of glossopharyngeal nerve
Which nerve innervates the tongue muscles?
A) glossopharyngeal
B) styloglossus
C) hypoglossal
hypoglossal
Which nerve innervates the stylopharyngeus muscle?
A) glossopharyngeal
B) styloglossus
C) hypoglossus
glossopharyngeal
(branchiomotor, 3rd arch derivative)
Which nerve innervates the facial expression muscles?
A) trigeminal
B) facial
C) glossopharyngeal
facial
(seriously? is this a real past paper question?)
Which nerve innervates the stylohyoid muscle?
A) trigeminal
B) facial
C) glossopharyngeal
facial
Where do the axons of the Edinger-Westphal nucleus terminate?
pterygopalatine ganglion
otic ganglion
ciliary ganglion
ciliary ganglion
Which ganglion of Cranial Nerve IX has multipolar neurons?
Otic Ganglion
(goes to parotid)
Which ganglion is in the fossula petrosa?
inferior ganglion of glossopharyngeal
which cranial nerve innervates the posterior belly of the digastric muscle?
facial
(anterior belly is the trigeminal, mandibular branch)
what is the branchiomotor nucleus of the recurrent laryngeal nerve?
nucleus ambiguus
Which nerve innervates the epiglottic valleculae?
Vagus, CN X
Which cranial nerve carries “guest fibers” from the spinal cord?
Hypoglossal
Which visceromotor nuclei can be found in the mesencephalon?
Accessory Oculomotor (Edinger-Westphal)
What kind of fibers can be found in the frontal nerve?
somatosensory
(it’s a branch of the opthalmic part of trigeminal, all of which are somatosensory)
Where can you find the perikaryon of the post-gangliotic parasympathetic fibers of the sphincter pupilae muscle?
ciliary ganglion
(leads to short ciliary nerve, which innervates sphincter pupillae and cilaris muscle)
why can an inner ear tumor cause disturbances in taste?
the chorda tympani passes through the tympanic cavity, and the chorda tympani innervates the anterior 2/3 of the tongue
where is the nuclei of pain-sensing nerve fibers that run through the teeth?
trigeminal ganglion
(pseudounipolar neurons with perikaryon in trigeminal [aka “Gasserian”] ganglion, that send protopathic sensation to spinal trigeminal nucleus)
where is the cell body of the taste fibers of the vagus nerve?
inferior ganglion of the vagus
(sends taste sensation to the solitary nucleus)
where is the cell body of the pregangliotic parasympathetic fibers that innervate the parotid gland?
inferior salivatory nucleus
(otic ganglion contains the cell body of the postgangliotic fibers)
What kind of fibers are found in the mental nerve?
Somatosensory
(becomes the inferior alveolar nerve, which then goes to the mandibular branch of trigeminal)
in which nerve can you find the postgangliotic parasympathetic fibers that run from the ciliary ganglion?
short ciliary nerves
what kind of nucleus is the dorsal vagal nucleus?
parasympathetic, GVM
(aka the medial ala cinerea)
which branchiomotor nucleus can be found in the medulla oblongota?
nucleus ambiguus
where can you find the perikaryon of the neurons innervating the muscle spindle of the masseteric muscle?
mesencephalic trigeminal nucleus
(part of jaw jerk reflex)
where can you find the perikarya of the axons of the buccal nerve?
what kind of nerve is the buccal nerve?
perikaryon = trigeminal (mandibular branch)
buccal nerve = somatosensory
(tricky! buccinator muscle is innervated by a branch of the facial nerve!)
in which nerve do the pregangliotic secretomotor fibers innervating the lacrimal gland pass through before synapsing?
greater petrosal nerve
which cranial nerve nuclei is the most cranial member of the dorso-medial nuclei group?
oculomotor nucleus CN III
Which cranial nerve’s branchiomotor fibers run through the parotid gland?
Facial Nerve (CN VII)
what kind of sensory fibers are transfered by the greater petrosal n?
Special Viscerosensory (Taste)
(Haven’t seen a whole lot about this, but according to Najeeb some taste fibers from the ant 2/3 tongue don’t go through chorda tympani and instead follow a pathway that runs in the fibers of the greater petrosal nerve. Greater petrosal nerve is otherwise a GVM nerve for lacrimal gland)
Which branchiomotor nerve is in the sensory branch of the mandibular nerve?
Mylohyoid nerve
Which sensory nerve is in the motor branch of the mandibular nerve?
Buccal nerve
(it’s not motor for buccinator!)
Where can you find the perikaryon of the taste-sensing fibers of the facial nerve?
Geniculate ganglion
(remember that geniculate ganglion is a sensory ganglion)
Where do the visceromotor fibers of the vagus nerve originate?
Medial Ala Cinerea (aka Dorsal Vagal Nucleus)
a parasympathetic nucleus
Which branchiomotor branch of the facial nerve is given off inside the cranium?
Stapedius Nerve
(to stapedius muscle)
Where can you find the perikaryon of the general somatosensory fibers of the lacrimal nerve?
Trigeminal Ganglion
(lacrimal nerve is GSS and part of trigeminal: opthalmic branch. For the motor innervation of the lacrimal gland, the lacrimal nerve receives fibers from the postgangliotic fibers that originated in the greater petrosal nerve, which is a branch of the facial)
What kind of nucleus is the accessory oculomotor nucleus?
Parasympathetic (GVM)
Which cranial nerve is the most cranial (superior) member of the ventro-lateral group of nuclei?
Trigeminal
(ventrolateral nuclei have branchiomotor neurons, i.e. CN V, VII, IX, X, XI)
Which branch of the accessory nerve (CN XI) transmits branchiomotor fibers?
Internal branch
Where do the fibers that go to the myenteric plexus of Auerbach originate from?
Dorsal Vagal Nucleus, aka Medial Ala Cinerea
What kind of nucleus is the trochlear nucleus?
Somatomotor
Where do the general visceromotor fibers that innervate the lacrimal gland synapse?
Pterygopalatine Ganglion
(Superior Salivatory nucleus -> greater petrosal nerve -> pterygopalatine ggl w/ synapse -> lacrimal gland. know that the details of this pathway are much more complicated than that)
To which cranial nerve belongs the nerve to the carotid sinus?
Glossopharyngeal
Which nerve passes above the anatomical snuffbox?
Superficial radial nerve
To which cranial nerve does the ramus stylohyoideus belong?
Facial
Which cranial nerve carries the pregangliotic fibers to the submandibular ganglion?
A. chorda tympani joining the lingual nerve
B. chorda tympani joining the facial nerve
C. tympanic nerve joining the facial nerve
chorda tympani joining the lingual nerve
The oculomotor nerve innervates the:
A. conjunctiva
B. levator palpebrae superioris muscle
C. lateral rectus muscle
B. levator palpebrae superioris muscle
(lateral rectus is the only muscle innervated by Abducens!)
Which of the following enrves will not participate in the somatosensory innervation of the nasal mucosa?
A. anterior ethmoidal
B. supraorbital nerve
C. nasopalatine
supraorbital nerve
(supraorbital nerve supplies the conjunctiva of the eye, the frontal sinus, and the skin from the forehead extending back to the middle of the scalp)
Where are the cell bodies of the afferent limb of the masticatory reflex arc?
mesencephalic trigeminal nucleus
(sensory part of the masticatory reflex arc
The salpingopharyngeus, palatoglossus, and palatopharyngeus muscles are innervated by the:
A. glossopharyngeal nerve
B. trigeminal nerve
C. vagus nerve
c. vagus
(glossopharyngeal n. innervates stylopharyngeus)
Which muscle is innervated by the hypoglossal nerve?
A. stylohyoid
B. styloglossus
C. stylopharyngeus
styloglossus
(CN XII does tongue muscles! stylohyoid is from facial, styolopharyngeus is glossopharyngeal)
