St. Vitus Dance is also known as Sydenham Chorea. This condition is caused by a bacteria known as Streptoccocal. A deterioration in the nerve cells of the brain causes movements known as Chorea, these are involuntary movements that becomes severe and serious and will then affect all the motor activities.
This condition can then be followed by a Rheumatic Fever.
The symptoms of this condition may appear gradually, the person suffering from this may feel nervous and appear fidgety, they may also have problems with activities such as writing.
As the symptoms become severe, the person may then become clumsy and they can drop things almost all the time and then they'll have jerking movements.