Which condition is primarily characterized by muscle rigidity and tremor, commonly seen in older adults?

• A. Tourette syndrome
• B. Sciatica
• C. Parkinson's Disease
• D. Spina bifida

Answer: (C)

Movement disorders in older adults often present with a tremor and increased muscle tone. The condition that best matches this pattern is Parkinson's disease. It typically features a resting tremor (often described as a pill-rolling tremor) and rigidity (increased resistance to passive movement, sometimes felt as cogwheel rigidity), along with slower movements and a shuffling gait. These motor signs are hallmark features of Parkinson’s and are most prominent in older adults.

Tourette syndrome involves motor and vocal tics, usually starting in youth. Sciatica is nerve pain along the leg from nerve compression. Spina bifida is a neural tube defect present at birth.