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8.5.4: Thoracic Vertebrae

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    Thoracic Vertebrae

    The bodies of the thoracic vertebrae are larger than those of cervical vertebrae. The characteristic feature for a typical thoracic vertebra is the spinous process, which is long and has a pronounced downward angle that causes it to overlap the next inferior vertebra. The superior articular processes of thoracic vertebrae face anteriorly and the inferior processes face posteriorly. These orientations are important determinants for the type and range of movements available to the thoracic region of the vertebral column.

    Diagram of a thoracic vertebra

    Rotating thoracic vertebra

    Above: A thoracic vertebra with (A) an anterior view, (B) an anterolateral view, (C) a lateral view of the left side of the vertebra, and (D) a superior view with anterior being at the bottom of the image. Click here to see rotating gif of a thoracic vertebra.

    Thoracic vertebrae have several additional articulation sites (facets), where a rib is attached. Most thoracic vertebrae have two facets located on the lateral sides of the body, each of which is called a costal facet (costal = “rib”). These are for articulation with the head (end) of a rib. An additional facet is located on the transverse process for articulation with the tubercle of a rib.

    Diagram of thoracic vertebrae articulating with ribs

    Rotating Diagram of thoracic vertebrae articulating with ribs

    Above: T11 and T12 (pink) articulating with right and left ribs 11 and ribs 12 (white), respectively. Ribs articulate with superior, inferior, and transverse costal facets located on the lateral aspects of each vertebra.

    This page titled 8.5.4: Thoracic Vertebrae is shared under a not declared license and was authored, remixed, and/or curated by Rosanna Hartline.

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