We are conducting research related to shoulder function. If you have never had any medical problems with your shoulder, you may be eligible to participate. Testing is invasive and requires the insertion of needles into your shoulder and the electrical stimulation of your muscles. If you are matched with a patient and complete all testing, you will be compensated $200 for your time. If we don’t have a match for you yet, you could be on a wait list for up to two years. You would be contacted by phone or email when we find a match or are ready to remove you from the wait list. Please call the Orthopedic Research Lab at the University of Oregon and leave your name, sex, age, and arm dominance if interested in participating in the study: 458-201-3149.