Intrinsic back muscles are a group of muscles located deep within the back. They play a crucial role in supporting the spine and maintaining posture. These muscles are responsible for movements such as extension, rotation, and lateral flexion of the spine. The intrinsic back muscles include several key muscle groups, such as the erector spinae, transversospinalis, and segmental muscles. Together, they work to stabilize the vertebral column and assist in various activities, from bending to lifting. Proper functioning of these muscles is essential for overall back health and mobility.