What are the 7th and 8th cranial nerves?
We’ll begin with the seventh and eighth, the facial and vestibulo-cochlear nerves. As we’ve seen, these two nerves leave the brainstem just below the pons. Here’s the facial, here’s the vestibulo-cochlear.
What is the 5 th cranial nerve?
The trigeminal nerve, also called the cranial nerve V (that’s the Roman numeral five), is the fifth of 12 cranial nerves. You have two trigeminal nerves, one on each side of your body. They start in your brain and travel throughout your head.
What does the 8th cranial nerve control?
The vestibulocochlear nerve (8th cranial nerve) is a sensory nerve. It is made up of two nerves, the cochlear, which transmits sound and the vestibular which controls balance.
What causes damage to the 8th cranial nerve?
CN VIII pathology can result from direct trauma, congenital malformations, tumor formation, infection, and vascular injury. Presenting symptoms include vertigo, nystagmus, tinnitus, and sensorineural hearing loss. Also, the involvement of the facial nerve, due to its proximity, should not be excluded during evaluation.
What is the seventh cranial nerve called?
The facial nerve
The facial nerve is the 7th cranial nerve and carries nerve fibers that control facial movement and expression. The facial nerve also carries nerves that are involved in taste to the anterior 2/3 of the tongue and producing tears (lacrimal gland).
Where does the 5th cranial nerve originate?
pons
Motor branches of the trigeminal nerve are distributed in the mandibular nerve. These fibers originate in the motor nucleus of the fifth nerve, which is located near the main trigeminal nucleus in the pons.
What happens if cranial nerve 8 is damaged?
CN VIII pathology can result from direct trauma, congenital malformations, tumor formation, infection, and vascular injury. Presenting symptoms include vertigo, nystagmus, tinnitus, and sensorineural hearing loss.
What does the 7th cranial nerve control?
The facial nerve is the seventh cranial nerve, or simply CN VII. It emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.
What are the 7 cranial nerves?
S ensory (CN I)
What cranial nerve is damaged?
The vestibulocochlear nerve, CN VIII, controls hearing and balance. Loss or a decrease of hearing may indicate nerve damage. Motor Function Nerves. Cranial nerves associated primarily with motor function are IV, VI, XI and XII. CN IV is the trochlear nerve, which controls inward and downward eye movement. Damage can cause double vision.
How to conduct a cranial nerve examination?
• Ask patient to turn head to one side and push against examiners hand or ask to flex head against resistance, palpate and evaluate strength of sternocleidomastoid muscle. • Evaluate both right and left side, compare for symmetry. CRANIAL NERVES 39 40.
https://www.youtube.com/watch?v=GSYDBDr6FaA
