This document discusses different types of traction used in medicine. Traction is used to stretch tissues and separate bony structures. It can be applied to the cervical or lumbar spine through mechanical pulley systems. Traction provides benefits like pain relief and increased mobility by enlarging intervertebral spaces and stretching muscles. It is commonly used for neck/arm pain and low back pain from nerve root compression. Proper technique and forces are important to benefit patients and avoid complications.