人体的脊柱是躯干的中轴和支柱,是下肢和上肢连接的枢纽,它具有支持体重、保持躯干的平衡、缓和震动和保护脊髓及内脏的功能。脊柱由24块椎骨、一块底骨及尾骨组成。每个椎骨间还有椎间软骨和椎间盆。随着人体活动的重力作用,脊柱在出生后逐渐形成了三个生理弯曲,即颈弯、胸弯 The human spine is the mid-axle and pillar of the trunk. It is the junction between the lower limbs and upper limbs. It supports weight, maintains trunk balance, moderates vibration, and protects the spinal cord and internal organs. The spine consists of 24 vertebrae, a base bone, and coccyx. There are also intervertebral cartilage and intervertebral discs between each vertebra. With the gravity of human activities, the spine gradually forms three physiological bends after birth, namely neck bend, chest bend