Physical therapist assistants’ jobs are projected to continue to be in great demand over the next ten years, owing to a growing elderly population and increased life-sustaining technology. Employment opportunities for this job are fast growing and at a much faster rate than the average growth of many other related occupations. The average annual salary of a PTA is $45,000. The main job of a physical therapist assistant is to help therapists in restoring the physical fitness of the patients who meet with accidents or suffer from congenital diseases. Physical therapy is generally useful to treat neurological disorders such as Alzheimer’s and Parkinson’s disease.