1 Flashcards
Muscles supplied by the superior Ramus?
Superior rectus, Levator palpebrea superioris
C.N. III is _________only?
Motor
What are the 3 nucleus of termination for CN V?
Main sensory, spinal, mesencephalic.
What would involve inability to constrict the pupil as well as loss of light reflexes?
Internal opthalmplegia
What type of CN paralysis is most common>?
Abducens
What does CN VI supply?
Motor to the lateral rectus
What are the 4 branches of the opthalmic division ?>
Meningeal, lacrimal, frontal, nasocillary.
Cell bodies to main and spinal nuclei have cell bodies located where?
Trigeminal Ganglion
What nerve is the only to leave off the facial nerve inside the facial canal
Nerve to stepidus
The facial nerve carries what kind of fibers?
Both motor and sensory, it’s a mixed nerve.
Where is the appart origin of the facial nerve
Medulopontoine n
What kind of neurons cross over?
Secondary
Spinal nerves are attached to the cord via what?
Anterior and posterior ROOTLETS
Where are the oculomotor nuclei located?
Periaquicutal grey matter, anterior to the cerebral aqueduct, at the level of the superior colliculus
The motor nucleus of the facial nerve recipes info from where?
Both hemispheres
What supplies Burma mater lining the middle cranial fossa?
Meningeal nerve
C.N. III exits the skull via what opening?
Superior orbital fissure
The greater petrosal nerve renters the cranial vault via what?
Foramen lacerum
Where are cell bodies of the sensory neurons of CN VII found?
The geniculate ganglion
Ptosis is due to a weakness if what muscle or a lesion to what nerve?
Levator palpebrae superiorism, oculomotor nerve
Both roots of CN VII travel together and enter what?
Internal acoustic meatus
Fibers from the lacrimal nerve originated from where?
Pterygopalatine ganglion
What nucleus contributes pre para fibers to the facial nerve
Superior salivary nucleus
Where does CN VI exit into>?
Pointing cistern
Where is the geniculate ganglion located>?
External genuine of the facial nerve
Does the trochlear nerve travel anterior or posterior before is exits?
Anterior
What is the apparent origin of CN IV?
TROCHLEAR NUCLEUS
What branches help supply the orbicularis oculi
Zygomatic
What is the once nucleus of origin for CN V>?
Trigeminal motor nuc
What nerve supplies the eyeball
Long ciliary nerve
Cranial nerve VI travels along what sinus?
Cavernous
Is Bell’s palsy unilateral or bilateral
Unilateral
Lower motor neurons synapse where?
Rexed lamina IX
How does the trochlear nerve exit the cranial vault?
Superior orbital fissure
What is the target site for visceral (autonomic) functions ?
Smooth, glandular tissue, cardiac.
The opthalmic is ________ function only?
Sensory
What is the apparent origin of CN I. ?
Interpeduncular cistern
Secondary sensory neurons decussate and convey info to where?
Thalamus (after crossing over)
What is the origin of CN VI,
Medulopontine sulcus
What is the clinical name for a droopy eyelid?>
Ptosis
The opthalmic division enters the orbit via what?
S.O.F.
When the roots of the facial nerve combine to form a single trunk where does it enter
Facial canal
What is the smallest branch of the opthalmic division ?
Lacrimal
What supplies the platysma
Cervical branch
What is it called when the parotid gland is removed
Superficial parotidectomy
Internuclear opthalmpplegia involves damage to what?
MEDIAL longitudinal fasciulus
What is the largest CN>
Trigeminal
Post para fibers of CN III pierce the sclera and travel along the internal surface of the sclera to supply?
The ciliaris and pupillary constrictors
What is the largest branch of the opthalmic division?
Frontal
What is the clinical word for double vision?
Diplopia
The chorda tympani combines with what never
Lingual
CN IV communicates with what plexus?
Cavernous
What contains primary sensory nuron cell bodies?
Dorsal root ganglion
What is the origin of CN IV
Posterior brain stem
Where do sensory fibers carried in the facial nerve terminate?
Upper part of the solitary nucleus
Where do both the trochlear and abducens never receive information from?
Bdmn area 8, superior colliculus and medial longitudinal colliculus
Axons from the accessory oculomotor nucleus synapse where?
Ciliary ganglion
What branch of CN V is the only to Cary motor fibers?
Mandibular
Where is the trigeminal ganglion found?
Trigeminal cave
Fibers from the superior salivary nucleus synapse where?>
Pterygopalatine or submandibular ganglion
What branch supplies the posterior belly of the digastric
Digastric branch
Where is the appart origin of CN V
Lateral aspect of the pons
What are possible causes for oculomotor paralysis ?>
Uncal herniations, diabetes, PCA aneurysms
Where is the trochlear nucleus located
Periaqueductal grey, caudal to the oculomotor nucleus.
What cranial nerves fibers cross as the exit?
CN IV
The chords tympani leaves the temporal bone via what
Ptertgotympanic fissure.
What is the clinical name for crossing of the eyes either internally or externally?
Strabismus
Hows does CN VI exit the skull>
Sup orbital fissure
What carries sensory info to the sphenoidal and ethmoidal sinuses
Posterior ethmoid nerve.
Muscles On the inferior part of the receives info only from ?
The contralateral cortex
What type of CN paralysis is the rarest?
Trochlear
What is the nucleus of origin for CN VI and where is it located?
Abducens nucleus, floor of the rhomboid fossa.
For CN V were are the cell bodies of primary sensory neurons located?
Trigeminal ganglion
What neurons release norepinephrine?
Postganglionic sympathetic
Muscles supplied by the inferior Ramus include?
Medial branch- medial rectus
Central branch- interior rectus
Lateral branch- inferior oblique
What Is the nucleus of origin for CN VII
Motor nucleus of the facial nerve
What is another name for the petrosal nerve
Superficial petrosal nerve
What is the target site for somatic information?
Skeletal muscle
Is diplopia objective or subjective??>
Subjective
What is the SMALLEST cranial nerve?
CN IV
How many neurons does it take to convey somatic sensory input from the trunk to the extremities?
3 (to spinal cord, posterior fibers to M.O.
Dendrites pass through the tri germinal ganglion to ascend to where?
Mesencephalic nucleus
What does CN IV supply ?
Superior oblique
Where are the only PRIMARY sensory neurons cell bodies located in the CNS
Mesencephalic nucleus
