The causes of dysphagia resulting from a stroke are largely related to the location of the stroke. Dysphagia mainly involves the glossopharyngeal and vagus nerves, which are distributed in the medulla oblongata of the brainstem. Therefore, if you have a brainstem stroke, specifically at the medulla oblongata, there is a significant chance of experiencing coughing due to aspiration and dysphagia. If the stroke occurs in a different area, these symptoms are unlikely to appear. A stroke in the cerebral hemisphere, since it has bilateral nerve supply, does not lead to noticeable coughing if only one side is affected. However, if one side is affected this year and the other side next year, similar symptoms of aspiration cough and dysphagia will occur. Therefore, neurologically, the location and specific site of the stroke are crucial, as each location presents different symptoms.