Osteoarthritis is an erosion of the cartilage of the joints. In inter-apophysary osteoarthritis, this is the part situated between the processes (the prominent parts of the bone) of the affected vertebrae. It is often referred to as inter-apophysary posterior osteoarthritis, as the processes are located at the back of the vertebrae, opposite the diskarthrosis which touches the intervertebral disc located in front of the vertebrae. The processes allow the stabilization of the vertebrae and the maintenance of the upper body in an upright position. The pain generated by this type of osteoarthritis can be treated with the help of analgesics, non-steroidal anti-inflammatories, and physical therapy which can improve the symptoms.