Published online by Cambridge University Press: 05 March 2022
Gastrointestinal complaints are the most frequent autonomic symptoms in Parkinson’s disease (PD) and affect almost all patients over the course of time [1, 2, 3]. The causes are not clear. It is likely to be a multifactorial event in which both central and peripheral degenerative processes play a role [4, 5]. In addition, influences from the medication have to be considered, which are certainly not predominant. The central degenerative process involving the dorsal vagal nucleus is certainly significant, but it does not explain the range of symptoms. Involvement of the enteric nervous system is likely to be more crucial, with PD typical changes involving the presence of Lewy bodies extending from the upper esophagus down to the rectum in the Plexus myentericus Auerbach and the Plexus submucosus Meissner [4, 6, 7, 8, 9, 10]. The functional disturbance can therefore affect the entire gastrointestinal tract [5]. Thus dysphagia can occur in addition to delayed gastric emptying and extended intestinal transit.
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