 Today I'm Sadik Olamide, I'm a clinical student and we're going to be talking about the typical features of the thoracic vertebrae. So we have three major features, one is the sloping lung spinous process, the demi-facet which is at the body. We have two demi-facets on each vertebrae, one on the superior and the other at the inferior side and we also have the facet by the transverse process and the demi-facet is for the attachment of the head of the ribs while the facet at the transverse process is for the tubercle of the rib. Let's say this is T5, it's for the attachment of the head of rib 5 and then this rib 5 is attached to the superior demfacet of T5 then the tubercle of the rib is always to the same rib as the vertebrae. This is for the typical vertebrae and then the atypical vertebrae which is T12. So this is the atypical vertebrae T12 and why is it atypical because the superior atypular facet is on the coronal plane while the inferior atypular facet is on the sagittal plane and the coronal plane for the T12 is attached to T11 above and the sagittal plane is attached to the lumbar vertebrae below. Therefore this vertebra has maximum stress and strength. Thank you very much. Thank you.