Several conditions can cause facial paralysis. Congenital causes include Mobius syndrome, Melkersson-Rosenthal syndrome, hemifacial microsomia and trauma during birth.
Paralysis agitans has four main motor symptoms: postural instability, bradykinesia, rigidity and tremors.
With postural instability, the patient has impaired balance, which affects walking.
In the United States, about 30 percent of people have a voice disorder in which the patient has difficulty with vocal quality, duration, resonance, loudness or pitch, according to the ...