Hoehn and Yahr Stage IV is described as which?

• A. Unilateral symptoms, minimal disability.
• B. Bilateral symptoms, no postural instability.
• C. Bilateral symptoms, postural instability, physically independent.
• D. Severe disability, requires some assistance but can stand/walk unassisted.

Answer: (D)

Stage four on the Hoehn and Yahr scale means the person has severe disability from Parkinson's disease, but they can still stand and walk without help. They may need assistance with many daily activities, yet they’re not completely dependent for mobility. This distinguishes it from earlier stages, which involve unilateral or bilateral symptoms with preserved balance, and from the final stage where a person is typically wheelchair-bound or bedridden. So the description that fits best is severe disability with the ability to stand or walk unaided, with some activities requiring support.