Region of the Back: Neck

Number of Vertebrae: 7

Abbreviation: C (C1-C7)

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Thoracic

Region of the Back: Chest

Number of Vertebrae: 12

Abbreviations: T (T1-T12)

Region of the Back: Loin- Below the ribcage and above the pelvic bone

Number of Vertebrae: 5

Abbreviations: L (L1-L5)

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Sacrum

Region of the Back: Lower Back- Sometimes pain is located there if the Sacrum is having a problem.

Number of Vertebrae: 5 fused parts

Abbreviations: S (S1-S5)

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Coccygeal, Coccyx

Region of the Back: tailbone

Number of Vertebrae: 4 fused parts