Cranial Nerves 1-6 Flashcards
which CNs come from midbrain? [4]
which CNs come from pons? [4]
which CNs come from medulla oblongata? [4]
which CNs come from midbrain? [4]
olfactory, optic, oculomotor, trochlea
which CNs come from pons? [4]
trigeminal, abducent, facial, vestibulochoclear
which CNs come from medulla oblongata? [4]
glossopharnygeal, vagus, accessory, hypoglossol
which of these CN does not come from the midbrain?
olfactory,
trochlea
optic
oculomotor
abducent
which of these CN does not come from the midbrain?
olfactory,
trochlea
optic
oculomotor
abducent (from pons)
which of these CN does not come from the medulla oblongata?
glossopharyngeal
accessory
hypoglossal
trochlear
vagus
which of these CN does not come from the medulla oblongata?
glossopharyngeal
accessory
hypoglossal
trochlear
vagus
which of these CN does not come from the pons?
trigeminal
vestibulochoclear
oculomotor
abducent
facial
which of these CN does not come from the pons?
trigeminal
vestibulochoclear
oculomotor
abducent
facial
olfactory nerve has special sensory fibres that pass through where? [1]
travelling to the brain, the olfactory passes through ^ to enter where?
olfactory nerve has special sensory fibres that pass through where? [1]
cribiform plate
travelling to the brain, the olfactory passes through ^ to enter olfactory bulb. then runs along olfactory tract to the brain
optic nerve:
what type of nerve (sensory / motor)?
describe optic pathway xx
optic chiasm:
what is name for left and right part of visual field
do optic nerve!!!
your left part of visual field is seen by which side of retina: right -> called
you right part of visual field is seen by which side of retina?
oculumotor (III), trochlear (IV) and abducens (IV) all innervate the WHAT? [1]
oculumotor (III), trochlear (IV) and abducens (IV) pass through which fissure to enter the orbit? [1]
oculumotor (III), trochlear (IV) and abducens (IV) all innervate the WHAT? [1]
extraocular muscles (muscles that move your eye)
oculumotor (III), trochlear (IV) and abducens (IV) pass through which fissure to enter the orbit? [1]
superior orbital fissure
which of the following CN are involved with extraocular muscles movement?
oculumotor (III), trigeminal (V), abducens (IV)
oculumotor (III), trochlear (IV), abducens (IV)
oculumotor (III), trigeminal (V), abducens (IV)
oculumotor (III), abducens (IV), optic (II)
optic (II), trigeminal (V), abducens (IV)
all innervate the WHAT? [1]
which of the following CN are involved with extraocular muscle movement?
oculumotor (III), trigeminal (V), abducens (IV)
oculumotor (III), trochlear (IV), abducens (IV)
oculumotor (III), trigeminal (V), abducens (IV)
oculumotor (III), abducens (IV), optic (II)
optic (II), trigeminal (V), abducens (IV)
what do 5/6 of the extraocular muscles attach to what, posteriorly of the eye socket / orbit? [1]
what do 5/6 of the extraocular muscles attach to what, anteriorly of the eye socket / orbit? [1]
how do the extraocular muscles attach to the eye in relation to the eyes position? [1]
what do 5/6 of the extraocular muscles attach to what, posteriorly of the eye socket / orbit? [1]
common tendionous ring
what do 5/6 of the extraocular muscles attach to what, anteriorly of the eye socket / orbit? [1]
eyeball
how do the extraocular muscles attach to the eye in relation to the eyes position? [1]
eye lies straight on (axis of gaze), but the extraocular muscles attach at an angle (axis of orbit)
describe difference of direction of axis of orbit and axis of gaze? [2]
describe difference of direction of axis of orbit and axis of gaze? [2]
- *due to extraocular muscle attachment: axis of orbi is at an angle [1]**
- *axis of gaze is straight on [1]**
eye ball movements: what movemetns cause the following?
rotation around vertical axis [2]?
rotation around transverse axis? [2]
rotation around anterioposterior axis? [2]
eye ball movements: what movemetns cause the following?
rotation around vertical axis [2]?
abduction / adduction
rotation around transverse axis? [2]
elevation / depression
rotation around anterioposterior axis? [2]
intorsion / extorsion
which extra ocular muscles attach to the common tendionous ring in the orbit? [4]
what are the names of the oblique extra ocular muscles?
which extra ocular muscles attach to the common tendionous ring in the orbit? [4]
superior rectus
inferior rectus
medial rectus
lateral rectus
= rectus muscles
what are the names of the oblique extra ocular muscles?
superior oblique
inferior olbique
which of the following is attaches to the eyeball anterior to the eyeball equator?
superior rectus
inferior olbique
medial rectus
lateral rectus
superior oblique
what movements does this cause when contract? [2]
which of the following is attaches to the eyeball anterior to the eyeball equator?
superior rectus
inferior olbique
medial rectus
lateral rectus
superior oblique
what movement does this cause when contract? [1]
elevation and intorsion
A
B
C
A: superior rectus
B:
C:
damage to which cranial nerve causes this?
optic nerve
oculuomotor nerve
vagus nerve
facial nerve
trigeminal nerve
damage to which cranial nerve causes this?
optic nerve
oculuomotor nerve
vagus nerve
facial nerve
trigeminal nerve
oculuomotor nerve has parasympatheric innervation on which muscles? [1] what do they cause? [1]
which muscle causes dilation of eye - what type of innervation is this? [2]
oculuomotor nerve has parasympatheric innervation on which muscle [2] what does this cause? [1]
constrictor pupillae - constricts pupil
cillary body - when contracts, it makes it smaller & makes lens fatter (near vision)
- when relaxes, ciliary body becomes bigger & makes lens smaller (far vision)
which muscle causes dilation of eye - what type of innervation is this? [2]
dilator pupillae - sympathetic innervation
what does it look like if you have oculomotor nerve damage, regarding eye movement - why? [2]
what does it look like if you have oculomotor nerve damage, regarding eye movement - why? [2]
lateral rectus and superior oblique arent innervated by the oculomotor nerve, so they still work
get depresion and abduction
how do you test to see if trochlea nerve is damaged / trochlea nerve palsy? [1]
how do you test to see if trochlea nerve is damaged / trochlea nerve palsy? [1]
when abduct and depress eye (superior oblique is damaged)
which foramena does the opthalmic nerve (V1) leave through?
which foramena does the maxillary (V2) leave through?
which foramena does the mandibular (V3) leave through?
which foramena does the opthalmic nerve (V1) leave through?
superior orbital fissues
which foramena does the maxillary (V2) leave through?
foramen rotundum
which foramena does the mandibular (V3) leave through?
foramen ovale
what is the cavernous sinus? [1]
which structures do you find in it? [
what is the cavernous sinus? [1]
venous space
which structures do you find in it? [5]
internal carotid artery
CN III (oculomotor)
CN IV
V1
V2
VI (abducent)
