Most shoulder dislocations are anterior, that means the humerus slips ahead, however it may dislocate backwards or downwards, nevertheless these are generally a lot less popular. Posterior shoulder dislocation, when the humerus (head from the arm bone) is moved back and over the socket. This is often an unusual kind https://www.theorthopaedicandpainpractice.com/what-are-shoulder-joint-dislocations/?_gl=1*164kc8h*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB