Effects of menthol on the triggering of the swallowing reflex in elderly patients with dysphagia

Not sure I'd like the injection into the pharynx. I looked into this from a comment in the book; The design of experiments in neuroscience by Mary Harrington
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2125.2006.02666.x/full