A medullary infarction may lead to hemiplegia. The medulla oblongata is located below the brainstem and contains important parts such as the respiratory and motor centers. When patients with medullary infarction result in central neuropathy, it can cause hemiparesis, dysphagia, dyspnea, and other symptoms. The causes of extended medullary infarction are atherosclerosis of large intracranial arteries, repeated mechanical or toxic endothelial injury, i.e., risk factors for cerebrovascular disease, such as hypertension, diabetes mellitus, dyslipidemia, and so on. Patients with medullary infarction who have damage to the respiratory center may experience dyspnea, shortness of breath, unstable breathing, or sigh-like breathing; if the motor center is damaged, the patient may experience upper motor neuron paralysis, and may experience increased muscle tone and hyperreflexia of the tendons, which can cause hemiparesis at this point. Once the diagnosis of medullary infarction is confirmed, the patient should actively cooperate with the doctor for treatment in order to improve the prognosis.