This document discusses various special tests used to evaluate the shoulder joint. It provides details on range of motion tests and impingement tests for the rotator cuff as well as tests for the acromioclavicular joint, bicep tendon, and shoulder instability. Impingement is classified based on the cause and grade. Specific tests described include Neer's impingement test, Hawkins-Kennedy test, empty can test, and others. Tests for the acromioclavicular joint, biceps tendon, and shoulder instability include the painful arc test, Yergason test, anterior apprehension test, and more.