Table of Contents
What nerve is VIII?
vestibulocochlear nerve
The vestibulocochlear nerve, also known as cranial nerve eight (CN VIII), consists of the vestibular and cochlear nerves.
What are cranial nerves I II and VIII?
Cranial nerves I, II, and VIII (olfactory, optic, and vestibulocochlear nerves) go to the sensory organs and they have afferent fibers. Cranial nerves III, IV, VI, and XII (oculomotor, trochlear, abducens, and hypoglossal nerves) innervate skeletal muscles of the head.
What does the 8th cranial nerve control?
Cranial nerve VIII brings sound and information about one’s position and movement in space into the brain. The auditory and vestibular systems subserve several functions basic to clinical medicine and to psychiatry.
Where is the VIII nerve?
brainstem
The 8th cranial nerve runs between the base of the pons (the middle portion of the brainstem) and medulla oblongata (the lower portion of the brainstem). This junction between the pons, medulla, and cerebellum that contains the 8th nerve is called the cerebellopontine angle.
How is CN VIII Vestibulocochlear assessed?
Cranial Nerve VIII Testing Procedures – Vestibulocochlear Nerve (Vestibular elements) Vestibular testing can include a variety of special tests. Typical examination includes eye tracking and saccades, static and dynamic balance, head tilting and turning influences on balance, and head-on-body and body-on-head testing.
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.
How do you test cranial nerve VIII?
Cranial Nerve 8 – Auditory Acuity, Weber & Rinne Tests The cochlear division of CN 8 is tested by screening for auditory acuity. This can be done by the examiner lightly rubbing their fingers by each ear or by using a ticking watch. Compare right versus left.
How do you test cranial nerve eight?
8th Cranial nerve
- Hearing is first tested in each ear by whispering something while occluding the opposite ear.
- Vestibular function can be evaluated by testing for nystagmus.
- If patients have acute vertigo during the examination, nystagmus is usually apparent during inspection.