Diagram. There are 7 cervical vertebrae in the cervical region. There are 12 thoracic vertebrae in the thoracic region. There are 5 lumbar vertebrae in the lumbar region. There are 5 sacral vertebrae, ...
The two main muscle groups involved in back function are: The extensors, which include the many muscles that attach to the spine and work together to hold your back straight while enabling you to ...
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