What is the function of the facial VII nerve?
The facial nerve (cranial nerve VII) is responsible for the muscles that determine facial expression, as well as the sensation of taste in the front of the tongue and oral cavity.
Which symptom can be caused by facial nerve CN VII injury?
CN VII disorders can be associated with dry mouth or choking (impaired salivation or loss of sensation to anterior portion of tongue), dry eyes/corneal injury or associated symptoms involving the adjacent CN VIII (hearing and balance).
What does the glossopharyngeal nerve do?
As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.
What is the eighth nerve?
The vestibulocochlear nerve, also known as cranial nerve eight (CN VIII), consists of the vestibular and cochlear nerves. The vestibular nerve is primarily responsible for maintaining body balance and eye movements, while the cochlear nerve is responsible for hearing.
How does cranial nerve 7 heal?
Corticosteroids. Corticosteroid medications reduce swelling in the seventh cranial nerve. Medication is taken by mouth once a day for 10 to 14 days to ensure the nerve recovers. If your symptoms indicate that the herpes zoster virus is causing inflammation, your doctor may recommend a stronger dose of corticosteroids.
What causes inflammation of the facial nerve?
The nerve that controls your facial muscles passes through a narrow corridor of bone on its way to your face. In Bell’s palsy, that nerve becomes inflamed and swollen — usually related to a viral infection. Besides facial muscles, the nerve affects tears, saliva, taste and a small bone in the middle of your ear.
Can stress cause facial paralysis?
Medical experts believe that stress weakens the immune system and damages the seventh cranial nerve (or the facial nerve) which causes facial paralysis. The condition causes one side of your face to droop or become stiff. A Bell’s Palsy patient will face trouble in smiling or closing the eye on the affected side.
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.