Wayne Clark’s hands don’t stop shaking. Not when they’re dangling, loose and forgotten, at his sides. Not when they’re spontaneously raised as a gesture in conversation. Not when they’re thrust outwards to receive the warm embrace of a family member or an old friend. When they’re at rest, near his hips, his large, pale fingers smack repeatedly against his clothing, producing a rhythmic clicking sound.
These tremors—the most noticeable symptom of the Parkinson’s disease Clark…