Peripheral facial palsy

This is a facial nerve disorder that controls muscle movement of the face, causing muscle weakness or paralysis. It is more common in adults. It may be secondary to an injury or of unknown origin. Symptom onset is rapid, leading to weakness of the forehead, eyelids or mouth and an inability to close the eye on the affected side within hours. Diagnosis is clinical. However, the examination may be supported by an electromyogram. Imaging tests will also be performed to ascertain whether the facial palsy is due to compression of the nerve by a specific injury. Treatment consists of eliminating the cause if one is found. If the cause of the paralysis is unknown, corticosteroids and antiviral treatment will be administered. The paralysis may abate to a greater or lesser degree in the first six months.