An 82-year-old gentleman gives a two month history of proximal muscle stiffness, especially in the morning. He denies any weakness.

[zahra.sham]

Module 04: Gerontology Health Care of the Elderly (Assessment)
An 82-year-old gentleman gives a two month history of proximal muscle stiffness, especially in the morning. He denies any weakness.

What is the next best investigation?

A. Antinuclear antibody
B. Erythrocyte sedimentation rate
C. Muscle biopsy
D. Electromyography
E. Plasma creatine kinase