GUMES cranial nerves Flashcards
if a cranial nerve is developed from the pharyngeal arches, what is its function
branchial motor for voluntary muscles
what are some involuntary muscles controlled by the cranial nerves
sphincter pupillae and lacrimal glands
what are the sensory cranial nerves
olfactory
optic
trigeminal
facial
vestibulocochlear
glossopharyngeal
vagus
what are the motor cranial nerves
oculomotor
trochlear
trigeminal
abducens
facial
glossopharyngeal
vagus
spinal accessory
hypoglossal
which cranial nerves are both sensory and motor
trigeminal
facial
glossopharyngeal
vagus
what type of cranial nerve is olfactory
special sensory
where does smell sensation come from
olfactory epithelium of the nasal canals, nasal septum, and superior conchae
how can the epithelium of the olfactory nerve be described as
regenerating, as it can heal itself
what is anosmia
no smell
what is the first cranial nerve
the olfactory nerve
what is the second cranial nerve
the optic nerve
what type of nerve is the optic nerve
special sensory
where are the optic nerve cell bodies
in the retina
where does the optic nerve exit
the orbital canal, where it crosses over at the optic chiasm
what is the third cranial nerve
oculomotor
what type of cranial nerve is the oculomotor nerve
somatic motor for the eye and visceral for the pupil
where is the oculomotor nerve in the brain
the midbrain
what are the muscles of the eye under the control of the oculomotor nerve
superior rectus
medial rectus
inferior oblique
levator palpebrae superiorus
what does the superior rectus do
move eye up
what does the medial rectus do
move eye inward toward the nose
what does the inferior oblique muscle do
move eye up and outward
what does the levator palpebrae superiorus do
lift and close the eyelid
how does the oculomotor constrict the pupil
parasympathetic supply to the sphincter papillae and ciliary muscle via the ciliary ganglion
what is the longest cranial nerve
the vagus
what happens when the oculomotor does not work due to increases pressure in the brain
fixed dilated eye turned down and away from the nose
what type of cranial nerve is the trochlear nerve
somatic motor
what does the trochlear nerve control
the superior obique muscle
where are the cell bodies of the trochlear nerve found
in the midbrain
is trochlear a long nerve
no
why is the trochlear nerve rarely paralysed on its own
it is short
what results in isolated palsy of the trochlear nerve
diplopia
what does the superior oblique muscle do
abducts, depresses and rotates the eye
what is diplopia
double vision
which cranial nerves are the most important in dentistry
trigeminal and facial