For about 25 years, a man's face had been doing something odd. Every time he smiled or laughed, his cheeks visibly trembled. When he flashed a deliberately forceful grin, the shaking disappeared.
The 60-year-old, who also had diabetes, was evaluated at a movement disorders clinic in Toronto. His doctors concluded the tremor was probably an unusual expression of essential tremor, the most common tremor disorder. Neurologists from Toronto's University Health Network, Baycrest and Taipei Veterans General Hospital in Taiwan described the case in Movement Disorders Clinical Practice, published online Sept. 4, 2025, and in the journal's February 2026 issue.
