When a person is suffering from Parkinson's disease, symptoms that causing difficulty in walking is called ataxia.
Patient with Parkinson's disease can have a disturbance in motoric coordination which was called ataxia. Ataxia can cause gait abnormality, making walk harder and increasing risk of fall.
Answer:
Just because something is atypical or unusual does not mean it is disordered. A person may experience atypical inner experiences or exhibit unusual behaviors, but she would not be considered disordered if they are not distressing, disturbing, or reflecting a dysfunction. For example, a classmate might stay up all night studying before exams; although atypical, this behavior is unlikely to possess any of the other criteria for psychological disorder mentioned previously.
That is the major calyx, hope I helped :)
