Generally speaking, it is usually to massage the muscles on both sides of the spine. For example, cervical vertebra can be massaged: trapezius muscle, anterior scalene muscle and so on. Lumbar vertebra can be massaged: oblique muscle outside abdomen, iliopsoas muscle, etc.
Massage is mainly to relax the starting and ending points of muscles and knead the "tendons" of muscles. Knead the tendon knot, you can press the two ends of the tendon knot by hand to stretch the muscles; The starting point and end point of relaxing muscles are the starting point and end point of plucking muscles.
structure
The spine consists of 26 vertebrae, namely 24 vertebrae (7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae), 1 sacrum, 1 coccyx. Since the sacrum is composed of 5 sacrums and the coccyx is composed of 3-4 coccyxes, the normal spine can also be composed of 32-33 coccyxes.
So many vertebrae, because there are strong ligaments around them, can maintain considerable stability, and because there are intervertebral joints connected with each other, they have considerable mobility. Although the range of motion of each spine is very small, if all of them move together, the range will increase a lot.
Reference to the above content: Baidu Encyclopedia-Spine