👉 The term "periappendicular" is used in anatomy and physiology to refer to the region of the spine where the lower back meets the upper back. This area includes the muscles, tendons, ligaments, and nerves that support the spine and its associated structures. The term periappendicular refers to the position of the spine relative to the body during movement. The term "periappendicular" is derived from the Greek words "peri," which means "around," and "appendicular,"