Final answer:
Side bending in the spine is known as lateral flexion, which occurs in the coronal plane and involves bending toward either side. It is supported by spinal joints, including symphysis and synovial joints.
Step-by-step explanation:
Side bending creates a type of movement in the spine known as lateral flexion. This occurs in the coronal plane and involves the bending of the neck or trunk toward the right or left side. The spinal joints that facilitate this movement include the symphysis joint formed by intervertebral discs and the plane type of synovial joint between articular processes of adjacent vertebrae. Movements of flexion and extension occur within the sagittal plane, with flexion being an anterior bending and extension being a posterior-directed motion. Lateral flexion is particularly facilitated by the structure and orientation of the articular processes in different regions of the spine, allowing the neck and lumbar regions considerable lateral flexion.