Which vertebrae have costal Demifacets?
Which vertebrae have costal Demifacets?
thoracic vertebrae
The primary characteristic of the thoracic vertebrae is the presence of costal facets. There are six facets per thoracic vertebrae: two on the transverse processes and four demifacets—the facets of the transverse processes articulate with the tubercle of the associated rib.
What is the difference between costal and articular facet?
The superior articular facet faces posteriorly, and the inferior one faces anteriorly. The costal articulation on the transverse processes faces anterolaterally. In lateral aspect the inferior articular facets are separated from the rear half of the vertebral body by a considerable gap.
What articulates with costal facets?
Rib 1 only articulates with a transverse costal facet. The superior costal facet joins the rib to the top of a vertebra. The transverse costal facet joins the rib to the transverse process of a vertebra, and the inferior costal facet joins the rib to the lower part of the vertebra.
What is the function of the costal facets?
The articulation of two adjacent demifacets and one rib form a costovertebral joint. The second type are articular facets found in the transverse processes of the thoracicvertebrae. These allow most of the rib to articulate with the same number vertebra (T1 – Rib 1, T2 – Rib 2, etc).
Which thoracic vertebrae have transverse costal facets?
The transverse costal facet is the surface that articulates with the tubercle of the rib with the same number for the first ten thoracic vertebrae. For example, the transverse costal facet of thoracic vertebra 5 articulates with the tubercle of rib 5.
What do the costal facets of the thoracic vertebrae articulate with?
Thoracic vertebrae make up the middle portion of the spinal column and can be distinguished by their facets for articulation with the ribs, one on each side of the vertebral body, and one on each transverse process.
Which bones articulate with thoracic facets and Demifacets?
Thoracic Vertebrae Each thoracic vertebra articulates with a pair of ribs. Each rib end articulates with demifacets above and below the discs to form synovial costovertebral joints as well as the thoracic transverse processes to form costotransverse joints.
Which vertebrae have two pairs of Demifacets on each side on their body for articulation with the ribs?
Thoracic vertebrae are unique in that they have facets on their bodies and transverse processes for articulation with ribs (T11 and T12 are exceptions). Two demifacets are located laterally on bodies of T2 to T9.
Are costal facets and Demifacets the same?
A facet is a flat or nearly flat surface on a bone. A demifacet is actually half of a facet and is where part of the head of the rib or part of the costal cartilage articulates and these are usually found on ribs 2 through 9. For example, rib 5 articulates with thoracic vertebra 4 at is inferior demifacet.
What is Demifacets?
A demifacet is actually half of a facet and is where part of the head of the rib or part of the costal cartilage articulates and these are usually found on ribs 2 through 9. The superior demifacet of the body of the vertebra receives the head of the rib with the same number as the vertebra of interest.
What transverse costal facet?
The transverse costal facet (or transverse costal fovea) is one of the costal facets, a site where a rib forms a joint with the transverse process of a thoracic vertebra.
Why do thoracic vertebrae have costal facets?
Distinguishing features. Distinguishing features of the thoracic vertebrae include the presence of facets on the sides of the bodies for articulation with the heads of the ribs, and facets on the transverse processes of all, except the 11th and 12th vertebrae, for articulation with the tubercles of the ribs.
Is the superior costal facet a demifacet or partial facet?
The superior costal facet is a demifacet or partial facet. It aligns with the inferior costal facet on the vertebra above to form a complete facet for articulation with the head of a rib.
Where are the costal demifacets on the sternum?
For example, rib 5 articulates with thoracic vertebra 4 at is inferior demifacet. Instead of a single facet for the costal cartilage of rib 7 on the body of the sternum, there may a demifacet on the inferior end of the body of the sternum as well as one on the xiphoid process.
Which is the demifacet of the costal cartilage?
A demifacet is actually half of a facet and is where part of the head of the rib or part of the costal cartilage articulates and these are usually found on ribs 2 through 9. The superior demifacet of the body of the vertebra receives the head of the rib with the same number as the vertebra of interest.
When do costal demifacets interrupt the vertebral body?
When these facets are interrupted by the superior or inferior margins of vertebral body, they are often referred to as costal demifacets ,.
