What is cranial nerve VIII?

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.

What is the function of facial nerve VII?

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).

What is the function of cranial nerve 8?

This cranial nerve has a vestibular part, which functions in balance, equilibrium, and orientation in three-dimensional space, and a cochlear part, which functions in hearing.

Where is my facial nerve?

This muscle is very easy to identify by the position (just deep to sternomastoid) and also by the direction of the muscle fibres that run towards the mastoid tip. The facial nerve trunk lies approximately 1 cm above and parallel to the upper border of the digastric muscle near its insertion at the mastoid tip.

How do you test cranial nerve VIII?

8th Cranial nerve

  1. Hearing is first tested in each ear by whispering something while occluding the opposite ear.
  2. Vestibular function can be evaluated by testing for nystagmus .
  3. If patients have acute vertigo during the examination, nystagmus is usually apparent during inspection.

How do you test for cranial nerve 8?

8th Cranial nerve

  1. Hearing is first tested in each ear by whispering something while occluding the opposite ear.
  2. Vestibular function can be evaluated by testing for nystagmus.
  3. If patients have acute vertigo during the examination, nystagmus is usually apparent during inspection.

Can facial nerve damage heal?

Facial nerve damage can be repaired in many cases. The success rate depends on the extent and the duration of the nerve damage. The sooner it is identified and treated appropriately, the better the prognosis.

How do you check for facial nerve Parotidectomy?

The posterior belly of digastric muscle is the most easily identifiable and a very consistent landmark for facial nerve dissection during parotidectomy. When supplemented with the tragal pointer, accuracy in identifying the facial nerve trunk is very high, thereby avoiding inadvertent injury to the nerve trunk.

How do you damage a facial nerve?

The facial nerve can also be damaged due to trauma sustained in an injury or during surgery. Blunt or penetrating trauma to the neck or head, caused by an accident or as a result of surgery, can damage the facial nerve.

What are the nerves of the face?

Trigeminal Nerve. The sensory innervation to the face comes from the trigeminal nerve which is the only cranial nerve that arises directly from the pons. Its three branches are the Ophthalmic (V1), Maxillary (V2) and Mandibular (V3). Each of those branches supplies the corresponding region on the face.

What is cranial nerve VII?

Cranial nerve VII is the facial nerve. It supplies motor, sensory and parasympathetic innervation to various structures of the head and neck.

What is nerve VII?

The facial nerve, or cranial nerve (CN) VII, is the nerve of facial expression. The pathways of the facial nerve are variable, and knowledge of the key intratemporal and extratemporal landmarks is essential for accurate physical diagnosis and safe and effective surgical intervention in the head and neck.

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