

Cervical: supports the head and neck; muscles are attached to allow a large freedom of movement
Costotransverse and costovertebral
Thoracic: supports axial loading, attached to ribs to form the most rigid section of the spine.
Lumbar: the largest vertebrae transfer weight. Bearing loads and increasing mobility of the trunk
Sacrum


Right rotation The left facet joint of the upper vertebra moves anteriorly (forward) while the right facet joint moves posteriorly (backward). At the same time, the intervertebral foramen on the right side (ipsilateral side of the rotation) closes, and the foramen on the left side (contralateral side) opens.
Left rotation The right facet joint of the upper vertebra moves anteriorly (forward) while the left facet joint moves posteriorly (backward).
At the same time, the intervertebral foramen on the left side (ipsilateral side of the rotation) closes, and the foramen on the right side (contralateral side) opens.
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