8. What are the general causes of dysphagia? Posted on April 18, 2023 Correct answer: (1) Bulbar palsy. (2) Hysteria. (3) Bulbar poliomyelitis. (4) Myasthenia gravis. (5) Diphtheria. Post navigation Previous Post7. What are the causes of dysphagia originating outside the oesophagus? Next Post9. What do you need to elicit from the history of dysphagia?