嬰兒的活動會逐漸將體重轉移至脊椎，漸漸地續發性的角度出現頸椎和腰椎部分。

前屈角度，這些角度會持續發展直到發育停止。

脊椎角度不是前屈就是背屈。

正常脊椎有四種彎區 ...1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1spine1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1scoliosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosis1kyphosisv1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesurgery1spinesu