This document discusses the history and evidence surrounding spinal immobilization practices in EMS. It begins with a brief history of spinal motion restriction from the 1960s to present. It then discusses the anatomy of the spine, costs of spinal cord injuries, and mechanisms of injury that could cause spinal injuries. The majority of the document questions the evidence and potential harms of traditional spinal immobilization using backboards and cervical collars. It presents research showing low rates of spinal injuries from blunt trauma and questions whether immobilization benefits outweigh risks like respiratory compromise, pressure ulcers, and delayed treatment. Alternative approaches adopted by some agencies are presented, as well as calls from organizations to use immobilization more judiciously.