The purpose of this project is to measure the laryngeal elevation in normal and in dysphagic patients with cerebrovascular (CVA) accident using ultrasonographic techniques. This work will include four group subjects. The first group consists of 20 young subjects (< 40 years); the second group consists of 20 age-matched normal subjects; the third group consists of 20 CVA patients without swallowing problems, and the fourth group consists of 20 CVA patients with dysphagia, which was proven by VFSS. The laryngeal elevation is detected by ultrasound with the transducer placing between the hyoid bone and thyroid cartilage. The two markers are easily detected on sonogram because of the presence of acoustic shadow, a specific character of bony structure on sonogram. The distance between the hyoid bone and thyroid cartilage before and during swallowing is measures and compared among the groups. The distance change of the patients with dysphagia is further compared with that defined by VFSS. With the result of this study, we will understand the status of laryngeal elevation during swallowing in normal and dysphagic subjects, and further determine the accuracy of ultrasonographic measurement in measuring the laryngeal elevation. With this knowledge, we might extend the usage of ultrasonographic examination on evaluating swallowing function.