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7th nerve palsy ( bell's palsy) (Diagnosis (Chest x-ray or CT and…
7th nerve palsy ( bell's palsy)
Causes
Infection
Herpes simplex( most common )
Herpes zooster ( second common)
Others
coxsackievirus, cytomegalovirus, adenovirus, and the Epstein-Barr, mumps, rubella, and influenza B viruses
Sarcoidosis
Idiopathic
Symptoms
The affected side becomes flat and expressionless; the ability to wrinkle the forehead, blink, and grimace is limited or absent
In severe cases, the palpebral fissure widens and the eye does not close, often irritating the conjunctiva and drying the cornea
Numb or heavy feeling in face
Diagnosis
Chest x-ray or CT and serum ACE levels to check for sarcoidosis
MRI if onset was gradual or other neurologic deficits are present
Clinical evaluation
Other testing if indicated by clinical findings
Treatment
Corticosteroids for idiopathic facial nerve palsy
Protection of cornea
Corneal drying must be prevented by frequent use of natural tears, isotonic saline, or methylcellulose drops and by intermittent use of tape or a patch to help close the eye, particularly during sleep.