What is Cranial Nerve I and what type of nerve is it?
Olfactory
Sensory
What is Cranial Nerve II and what type of nerve is it?
Optic
Sensory
What is Cranial Nerve III and what type of nerve is it?
Oculomotor
Motor
What is Cranial Nerve IV and what type of nerve is it?
Trigeminal
Motor
What is Cranial Nerve V and what type of nerve is it?
Trochlear
Both
What is Cranial Nerve VI and what type of nerve is it?
Abducens
Motor
What is Cranial Nerve VII and what type of nerve is it?
Facial
Both
What is Cranial Nerve VIII and what type of nerve is it?
Vestibulocochlear
Sensory
What is Cranial Nerve IX and what type of nerve is it?
Glossopharyngeal
Both
What is Cranial Nerve X and what type of nerve is it?
Vagus
Both
What is Cranial Nerve XI and what type of nerve is it?
Accessory
Motor
What is Cranial Nerve XII and what type of nerve is it?
Hypoglossal
Motor
What does the menace response test?
CN II: Optic (S)
CN VII: Facial (B)
What does the pupillary light reflex (PLR) test?
CN II: Optic (S)
CN III: Oculomotor (M)
What does pupillary symmetry indicate?
It evaluates CN III (Oculomotor - M) and sympathetic innervation to the eye.
What does pupillary size indicate?
It evaluates CN III (Oculomotor - M) and sympathetic innervation to the eye.
Injury to CN VI affects ocular position in what way?
Injury to CN VI (Abducens - M) causes medial strabismus
Injury to CN III or CN VIII affects ocular position in what way?
Injury to CN III (Oculomotor - M) and CN VIII (Vestibulocochlear - S) causes ventrolateral strabismus
What does the palpebral reflex test?
CN V: Trochlear (B)
CN VII: Facial (B)
What does the corneal reflex test?
CN V: Trochlear (B)
CN VII: Facial (B)
What does the retractor oculi reflex test?
CN V: Trochlear (B)
CN VI: Abducens (M)
What does the gag reflex test?
CN IX: Glossopharyngeal (B)
CN X: Vagus (B)
Brainstem
What does tongue atrophy indicate?
A lesion on the brainstem or on CN XII: Hypoglossal (M)
If clinical signs are only seen in the limbs, the lesion is most likely where?
Below the foramen magnum.
