Function
This cranial nerve is used when picking out a new perfume.
What is the Olfactory Nerve (CN I)?
Name two nerves that are especially important for a Speech Language Pathologist to be familiar with when assessing a child.
What is...
The Trigeminal Nerve (CN V)
The Facial Nerve (CN VII)
The Vestibulocochlear Nerve (CN VIII)
The Glossopharyngeal Nerve (CN IX)
Hypoglossal Nerve (CN XII)
**This is especially important for SLPs to know!
This cranial nerve originates in the pons, emerges from the brainstem, and travels through the temoral bone. Main branches include the temporal, zygomatic, buccal, mandibular, and cervical branches
What is the Facial Nerve (CN VII)?
**This is especially important for SLPs to know!
A lesion of this nerve causes the tongue to point toward the injured side when it sticks out.
What is the Hypoglossus Nerve (CN XII)?
**This is especially important for SLPs to know!
A 20 year old woman comes into the ER with a headache and sensitivity to light. The nurses notice that her pupils are very large. This cranial nerve is most likely affected.
What is the Oculomotor Nerve (CN IV)?
This cranial nerve is in charge of hearing and balance.
What is the Vestibulocochlear Nerve (CN VIII)?
**This is especially important for SLPs to know!
Which eye movement would be most affected by a lesion to the Trochlear Nerve?
What is the ability to move the eye downward and inward?
Originating from the midbrain, this nerve exits dorsally and crosses before innervating the superior oblique muscle of the opposite eye.
What is the Trochlear Nerve (CN IV)?
A lesion to this cranial nerve may cause numbness of the face, weakness of the master, and difficulty chewing.
What is the Trigeminal Nerve (CN V)?
A 45-year-old patient complains of difficulty seeing out of their right eye. Examination reveals complete vision loss in that eye, but normal vision in the left. Which cranial nerve is most likely damaged?
What is the Optic Nerve (CN II)?
This cranial nerve is responsible for somatosensation to the face, jaw, oral mucosa, and teeth. It plays a role in opening the mouth against resistance and clenching down teeth.
What is the Trigeminal Nerve (CN V)?
**This is especially important for SLPs to know!
This cranial nerve includes testing for the ability to raise eyebrows, close eyes tightly, smile, puff out cheeks, and the ability to taste sweet, salty, sour, and bitter substances.
What is the Facial Nerve (CN VII)?
**This is especially important for SLPs to know!
This cranial nerve is the most anterior of all the cranial nerves.
What is the Olfactory Nerve (CN I)?
When this cranial nerve is damaged, paralysis of the lateral rectus muscle leads to medial strabismus and horizontal double vision.
What is the Abducens Nerve (CN VI)?
A 32-year-old patient reports difficulty walking downstairs and complains of double vision, especially when reading or looking down. On examination, one eye appears slightly elevated when the patient tries to look downward toward the nose. The doctor suspects this cranial nerve may have been damaged.
What is the Trochlear Nerve (CN IV)?
This cranial nerve helps you taste and swallow as well as gag reflex.
What is the Glossopharyngeal Nerve (CN IX)?
**This is especially important for SLPs to know!
To assess the functionality of this nerve, your doctor might flash a light in your eye.
What is the Oculomotor Nerve (CN III)?
(Pupil Response)
This cranial nerve has fibers from the retina, converge at the optic chiasm, synapse in Lateral Geniculate Body of thalamus, and then arrive to the Occipital Lobe.
What is the Optic Nerve (CN II)?
A lesion to this cranial nerve may cause a person to feel sluggish, and slow down their heart rate.
What is the Vagus Nerve (CN X)?
A 50 year old man comes into the ER with bradycardia (slow heart rate) and low blood pressure. The doctor suspects this cranial nerve may be damaged.
What is the Vagus Nerve (CN X)?
This cranial nerve controls the movements of almost all tongue muscles, allowing for speech, chewing, and swallowing.
What is the Hypoglossus Nerve (CN XII)?
**This is especially important for SLPs to know!
When assessing this nerve, you ask a patient to shrug their shoulders and turn their head against resistance to test the strength of the trapezius and sternocleidomastoid muscles.
What is the Accessory Nerve (CN XI)?
This cranial nerve originates from both the medulla oblongata and the upper spinal cord and exits the skull through the jugular foramen.
What is the Accessory Nerve (CN XI)?
A lesion of this cranial nerve can cause loss of taste on the back of the tongue, difficulty swallowing, and loss of gag reflex.
DOUBLE POINTS: Spell the nerve correctly.
What is the Glossopharyngeal Nerve (CN IX)?
**This is especially important for SLPs to know!
The patient comes in with symptoms of vertigo, hearing loss, and tinnitus. MRI testing is used to identify the cause.
What is the Vestibulocochlear Cranial Nerve (CN VIII)?
**This is especially important for SLPs to know!