What is the prevalence of vocal tremor in patients with Parkinson disease (PD)?

Updated: Jan 24, 2019
  • Author: Robert A Hauser, MD, MBA; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Perez et al found that vocal tremor is present in 55% of patients with Parkinson disease. [29] Interestingly, only 35% of patients with Parkinson disease exhibited a resting vocal cord tremor, whereas the remainder exhibited kinetic tremor. The tremor is primarily a vertical laryngeal movement. PPS was found to carry a higher incidence of vocal tremor (64%), with most tremors located in the arytenoids. The authors found no vertical laryngeal tremor in patients with PPS. [29]


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