The human spine extends along the body from the neck to the pelvis. It consists of 33 bones (vertebrae) separated by cartilage discs: 7 cervical, 12 thoracic, 5 lumbar, 5 fused sacral vertebrae, and 4 fused coccygeal bones. The vertebrae, connected by ligaments, muscles, and tendons, form a flexible yet strong structure that allows for body movement, protects the spinal cord nerves, and supports the body in an upright position.
Cartilage discs act as shock absorbers, providing mobility to the spine. The disc contains a gel-like core that, with age and load, can deform and thin, leading to reduced spacing between vertebrae. This often results in nerve compression, causing back pain and leg pain (claudication when walking).
