Cranial Nerves Flashcards
How does branchial motor differ from somatomotor?
(Come from different parts of the embryo)
Brachial- branchial arches of embryo
Somatomotor- comes from somites of the embryo
Does the olfactory nerve travel through the thalamus
No
What is the bone that the first order neurons (olfactory nerves) go through
Cribaform plate
Cerebral connection for smell
Medial temporal lobe
visual acuity
how clear or sharp you see something
Pat of the eye that is a muscle sphincter
iris
part of the responsible for central vision
Macula lute
Purpose of the retinogeniculocalcarine pathway
conscious vision
Anopsia
Loss of vision in one whole eye
damage between eye ball & optic chiasm
Hemianopsia
Lose half of vision in both eyes
damage between optic chiasm & thalamus
Quadrantonanopsia
Lose a quadrant of vision in both eyes
damage occurs at myers lope
Two components that are in cranial nerves but not in spinal nerves
Brachial Motor
Special Sensory
Loss of Direct (R)
Damage to R occulomotor
Loss of Consensual (L)
Damage to L occulomotor
Loss of Neither PLR
After optic chiasm in optic tract
Loss of Both PLR
between eyeball & optic chiasm
Damage to the left optic tract between the optic chiasm and the lateral geniculate body would result in (vision deficit)
Right hemianopsia
Trochlear nerve innervates what muscle
Superior oblique
The medial longitudinal fasciculus connects
The 3 motor nuclei to the vestibular nuclei, accessory nuclei, and superior coliculis
Air hits your eye, what cranial nerve carries the afferent info for the blink reflex
Trigeminal
Pathway for the accommodation reflex
Retonogeniculioclarine pathway
Conjugate Movements
eyes move in the same direction
Vergent mvt’s
eyes move in different directions
Pursuit mvt’s
slow smooth mvt following a moving stimulus
Saccadic mvt’s
fast jerkey mvt, following a moving stimulus
Reading is an example of what eye mvt
saccadic
What two eye movements do you use when you are watching an object as it approaches your nose
Vergent & Pursuit
Never that innervates the muscles of mastication
trigeminal
What nerves have bilateral innervation
Trigeminal, facial
3 situations when nystagmus is normal
End range of vision
Post-rotary (spinning around)
optokinetic: following a moving object (train)
What two nerves innervate salivatory glands
glossopharyngeal & facial
describe VOR
maintaining visual fixation on a still target while moving your head
two nerves that provide sensory information about taste
glossopharyngeal, facial
Conductive deafness
louder on same side
Sensorineural deafness
louder on opposite side
nerve damage
How does the cochlear nerve transmit information about the loudness of the sound
Dependent on the frequency of action potentails
Part of the thalamus that receives information about hearing
Medial geniculate body
UMN lesion of the hypoglossal nerve, tongue deviates to?
The weaker side
The LMN’s of the accessory nerve receives what kind on innervation from the UMN’s
contralateral
