Chiropractic:Vertebra T3

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A misaligned thoracic vertebra T3 can cause bronchitis, pleurisy, pneumonia, nose congestion, and influenza.
Structure of a typical thoracic vertebra  (click image for larger view)
The 1st and 9th-12th thoracic vertebrae have some peculiarities.
Surface orientation of T3 and T7

Vertebra T3 is the third of 12 thoracic vertebrae of the spine. By convention, the thoracic vertebrae are numbered, with the first one (T1) located closest to the skull and higher-numbered vertebrae (T2-T12) proceeding down the spine.


2.  Structure of thoracic vertebra T3: Thoracic vertebra T2 - T8 have the same general characteristics, as follows:

  • The body is heart-shaped, and as broad in the antero-posterior as in the transverse direction. They are:
    • slightly thicker behind than in front;
    • flat above and below;
    • convex from side to side in front;
    • deeply concave behind; and
    • slightly constricted laterally and in front.
They present, on either side, two costal demi-facets, one above, near the root of the pedicle, the other below, in front of the inferior vertebral notch; these are covered with cartilage in the fresh state, and, when the vertebrae are articulated with one another, form, with the intervening intervertebral fibrocartilages, oval surfaces for the reception of the heads of the ribs.
  • The pedicles are directed backward and slightly upward, and the inferior vertebral notches are of large size, and deeper than in any other region of the vertebral column.
  • The laminae are broad, thick, and imbricated, i.e. they overlap those of subjacent vertebrae like tiles on a roof.
  • The vertebral foramen is small, and of a circular form.
  • The spinous process is long, triangular on coronal section, directed obliquely downward, and ends in a tuberculated extremity.
  • The superior articular processes are thin plates of bone projecting upward from the junctions of the pedicles and laminae. Their articular facets are practically flat, and are directed backward and a little lateralward and upward.
  • The inferior articular processes are fused to a considerable extent with the laminae, and project but slightly beyond their lower borders. Their facets are directed forward and a little medialward and downward.
  • The transverse processes arise from the arch behind the superior articular processes and pedicles. They are thick, strong, and of considerable length, directed obliquely backward and lateralward. Each ends in a clubbed extremity, on the front of which is a small, concave surface, for articulation with the tubercle of a rib.


3.  Associated spinal nerve and blood vessels: Nerves and blood supply to the lungs, bronchial tubes, pleura, chest, and breast passes out underneath vertebra T3. As such, a misalignment of vertebra T3 can cause bronchitis, pleurisy, pneumonia, nose congestion, and influenza.