The cervical, thoracic and lumbar vertebrae are characterized by differences in the position and size of the vertebrae, physiological curvature, mobility and weight bearing. 1. The position and size of vertebrae: in terms of position, the cervical vertebrae are located at the top, the thoracic vertebrae are located in the middle, and the lumbar vertebrae are located at the bottom; in terms of the size of the vertebrae, the cervical vertebrae have the smallest vertebrae, the thoracic vertebrae are the second smallest vertebrae, and the lumbar vertebrae have the largest vertebrae. 2. Physiological curvature: the cervical vertebrae are convex forward, the thoracic vertebrae are convex backward, and the lumbar vertebrae are convex forward. 3. Mobility: the cervical spine has the greatest mobility in left-right rotation, the lumbar spine has the greatest mobility in forward flexion and backward extension, and the thoracic spine has the least mobility. 4. Weight bearing: the cervical spine bears the least weight, while the lumbar spine bears the most weight. If you have cervical, thoracic and lumbar spine discomfort, please go to the hospital in time to improve the examination and diagnosis, and follow the doctor’s instructions for treatment, so as not to delay the condition.