Many people ask why the body feels stiff and rigid during sleep wake up? Or why there is an older road that is still good, while the other younger age is slightly humped roads. The key turns in the spine.
Normal human spine consists of vertebrae 33-34 segment, which is divided into 5 major groups,
namely (1) cervical spine (cervical vertebral) segment consists of 7 vertebrae, spinal thoracal (vertebral thoracal) have a 12 spine segment, (3) spinal lumbal (vertebral lumbal) segment has 5 vertebrae, (4) sacrum spine (vertebral sacral) segment consists of 5 vertebrae, coccygeal vertebrae (vertebral coccygeal) consists of the 4-5 segment backbone