Off and on state assessment of swallowing function in Parkinson's disease

We read with great interest the three recent articles in your journal which provided controversial discussion on the effects of levodopa on dysphagia in Parkinson's disease (PD). After reviewing the available literature on this topic Melo & Monteiro found no evidence that levodopa improves deglutition consistently in individuals with PD [ [1] Melo A. Monteiro L. Swallowing improvement after levodopa treatment in idiopathic Parkinson's disease:...