<qa>  What is the primary outcome measure of the Shaker exercise?The primary objective of this 5-year project is to identify which of two therapy programs, the Shaker exercise versus traditional therapy, results in the largest number of stable, non-oral dysphagic patients who can swallow safely and return to full oral feeding after 6 weeks of intervention. The study is powered adequately so that this aim can be tested separately for head and neck cancer and stroke patients. Our primary outcome measure is return to oral feeding, i.e., 100 of nutrition and hydration by mouth. 