9 Questions
Which of the following is a characteristic feature of most thoracic vertebrae?
They are independent.
What is the purpose of the bilateral costal facets on the vertebral bodies of thoracic vertebrae?
For articulation with the heads of ribs
Which thoracic vertebrae have only a single pair of whole costal facets?
T11 and T12
Where are the superior and inferior costal facets typically located on the bodies of typical thoracic vertebrae?
Superior and inferior posterolateral margins of the bodies
Why do the superior costal facets of vertebra TI not have demifacets?
There are no demifacets on the C7 vertebra above.
How many bilateral pairs of costal facets does vertebra T10 have?
One
Where are the whole costal facets located in vertebrae T11 and T12?
On their pedicles.
How are the superior and inferior articular facets oriented in typical thoracic vertebrae?
Superior facets face posteriorly and inferior facets face anteriorly.
What is the purpose of the bilateral joint planes between adjacent thoracic vertebrae?
To limit rotational movements between vertebrae.
Study Notes
Characteristics of Thoracic Vertebrae
- Most thoracic vertebrae have a characteristic feature: bilateral costal facets on the vertebral bodies.
Costal Facets
- The bilateral costal facets on the vertebral bodies of thoracic vertebrae articulate with the heads of ribs, forming a joint.
- The superior and inferior costal facets are typically located on the bodies of typical thoracic vertebrae.
- Vertebra T1 has no demifacets on its superior costal facets.
Exceptional Thoracic Vertebrae
- Vertebrae T11 and T12 have whole costal facets located on their bodies.
- Vertebra T10 has two bilateral pairs of costal facets.
Articular Facets
- The superior and inferior articular facets in typical thoracic vertebrae are oriented in an anteroposterior direction.
Joint Planes
- The bilateral joint planes between adjacent thoracic vertebrae allow for slight movements and flexibility.
Test your knowledge of thoracic vertebrae and their characteristic features with this quiz. Learn about bilateral costal facets and other important aspects of these vertebrae.
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