NIH https://www.nidcd.nih.gov/health/dysphagia 50 pairs of nerves and muscles to work effectively NIDCD: Dysphagia dysphagia dysphagia difficult for people to swallow dysphagia dysphagia according to the National Institute of Health dysphagia difficulty swallowing difficult for people to swallow dysphagia x https://www.nidcd.nih.gov/health/dysphagia