Anatomy
Vertebrae T9 – T12 (lowermost thoracic) show progressive change from the mid-thoracic pattern of demi-facets on the body (whereby the heads of ribs straddle 2 vertebrae), to single facets on the pedicle.
Also, the transverse process has no articular surface (and 12th rib has no tubercle).
Clinical
Articulates above with T11 (top of vertebral body and 2 superior articular processes), L1 below (bottom of body and 2 inferior articular processes), 12th rib (facet on body).
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