What's difference between dyskinesia and apraxia?

Voluntary movement. Dyskinesia is a general term for involuntary movements. The most common reason is the side effect of medications for parkinson's disease, but there are several other diseases that can cause dyskinesia. Apraxia is the inability to perform a skilled motor act, like walking, in the absence of weakness or numbness. It is due to a disturbance in the control systems in the brain.