The Neer Impingement test was created by orthopedic surgeon Dr. Charles S. Neer, II, MD in 1972 based on what he observed as he performed shoulder operations. He noted that there was a significant degeneration in the supraspinatus tendon. He found that when the arm was in flexion and internal rotation it compressed on the tendons under the acromioclavicular joint. Therefore, he created this test to reproduce the symptoms looking for an impingement in that area.
