What are typical cervical vertebrae?
Typical Vertebrae: C3, C4, C5, and C6 C3, C4, C5, and C6 cervical vertebrae. Cervical vertebrae C3 through C6 are known as typical vertebrae because they share the same basic characteristics with most of the vertebrae throughout the rest of the spine. Typical vertebrae have: Vertebral body.
What are atypical vertebrae?
Atypical vertebrae are the vertebrae with modified structures due to their function and position. Out of the seven cervical vertebrae, C1 (atlas), C2 (axis) and C7 (vertebra prominens) are atypical vertebrae.
What is articular facet?
A facet is a flat or nearly flat surface on a bone. The vertebral articular facets are where two vertebrae articulate. There will be one pair of facets on the superior side of the vertebrae and one pair on the inferior side of the vertebrae.
How many vertebrae present in vertebral column?
In humans, the vertebral column usually consists of 33 vertebrae, placed in series and connected by ligaments and intervertebral discs. However, the number of vertebrae can vary between 32 and 35. Usually there are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 caudal (coccygeal) vertebrae.
Is C7 typical or atypical?
Of the cervical vertebrae, the atlas (C1), axis (C2) and vertebra prominens (C7) are considered atypical cervical vertebrae.
Why is C7 prominent?
The seventh cervical vertebra is known as the vertebra prominens because of its prominent spinous process (Fig. 5-14). Because of its large spinous process and its location at the base of the neck, C7 serves as an attachment site for many muscles.
Why is the 11th thoracic vertebrae considered atypical?
The 1st thoracic vertebra is considered an “atypical” because of the complete costal facet for the head of the 1st rib. In its turn, the Th10, Th11, and Th12 has one complete costal facet each. …
What is superior articular facet?
Superior articular facet (facies articularis superior) is a posterior facing, slightly concave surface on the superior articular process. It articulates with the inferior articular facet on the vertebra above.
What does articular mean in anatomy?
Definition of articular : of or relating to a joint articular cartilage.
Where is 12 vertebrae located?
Where is the T12 Vertebra Located? The T12 vertebra sits right above the lumbar spinal column. It is the largest and most inferior of the thoracic spinal vertebrae. The T12 vertebrae location is between the T11 vertebra and the first lumbar vertebra, L1, in the trunk region.
What are the 5 lumbar vertebrae?
Position of human lumbar vertebrae (shown in red). It consists of 5 bones, from the top down, L1, L2, L3, L4 and L5. The lumbar vertebrae are, in human anatomy, the five vertebrae between the rib cage and the pelvis.
Why is C7 atypical?
C7 may be considered typical or atypical but has two distinct features. The first is that unlike the rest of the cervical vertebrae, is that the vertebral artery does not traverse the transverse foramen. The second is that it contains a long spinous process, also known as “vertebra prominens.”