Cranial Nerves Flashcards
how many cranial nerves are there?
12 (paired)
where do the cranial nerves arise?
- oflactory and optic (first 2) - cerebrum
- remaining ten emerge from brainstem
which cranial nerves originate from the cerebrum?
olfactory (CN I)
optic (CN II)
which cranial nerves arise from the brainstem?
CN III - XII
which cranial nerve comes from the posterior side of the midbrain?
trochlear nerve IV
where does the trochlear nerve (CN IV) arise?
posterior side of the midbrain
what cranial nerve arises from the midbrain-pontine junction?
oculomotor (CN III)
where does the oculomotor nerve arise?
midbrain-pontine junction
what cranial nerve arises from the pons?
trigeminal (V)
where does the trigeminal (V) nerve arise?
pons
what cranial nerves arise from the pontine-medulla junction?
abducens (VI)
facial (VII)
vestibulocochlear (VIII)
where do cranial nerves VI-VIII arise?
pontine-medulla junction
what cranial nerves arise from the medulla oblongata posterior to the olive?
glossopharyngeal (IX)
vagus (X)
accessory (XI)
where do the glossopharyngeal, vagus and accessory cranial nerves arise?
medulla oblongata, posterior to the olive
do
where does the hypoglossal nerve arise?
medulla oblongata, anterior to the olive
what cranial nerve arises from the medulla oblongata, anterior to the olive?
hypoglossal (XII)
CN I?
olfactory
CN II?
optic
CN III
oculomotor
CN IV
trochlear
CN V
trigeminal
CN VI
abducens
