What is the Difference Between Typical and Atypical Vertebrae

The main difference between typical and atypical vertebrae is that typical vertebrae consist of a body, vertebral arch, and transverse processes, whereas atypical vertebrae contain deviated structures based on their functional requirements.

1. What is meant by typical and atypical cervical vertebrae?
2. What is a typical vertebra?
3. Is C7 typical or atypical?
4. What cervical vertebrae are atypical?
5. Why is C7 atypical?
6. Which of the following is a list of atypical vertebrae?
7. What separates the vertebrae in life?
8. What is the last vertebrae called?
9. What are the 4 types of vertebrae?
10. What is special about C7?
11. What is another name for the Odontoid process?
12. Which part of the spine has the most rotation?

What is meant by typical and atypical cervical vertebrae?

Assoc Prof Craig Hacking ◉ ◈ and Dr Dinesh Palipana et al. Of the cervical vertebrae, the atlas (C1), axis (C2) and vertebra prominens (C7) are considered atypical cervical vertebrae. The atlas (C1) lacks a body or spinous process. It has anterior and posterior arches with lateral masses.

What is a typical vertebra?

Figure 7.23 Parts of a Typical Vertebra A typical vertebra consists of a body and a vertebral arch. The arch is formed by the paired pedicles and paired laminae. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes.

Is C7 typical or 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.”

What cervical vertebrae are atypical?

Atypical Vertebrae: C1 and C2

C1 and C2 are considered atypical vertebrae because they have some distinguishing features compared to the rest of the cervical spine. C1 Vertebra (the atlas). The top vertebra, called the atlas, is the only cervical vertebra without a vertebral body.

Why is C7 atypical?

C7 is atypical due to the following features: Small/absent foramen transversarium, that carries accessory veins rather than the vertebral artery. Very long spinous process that is not bifid. Anterior tubercle and root of C7 is especially small, and provides attachment for the suprapleural membrane.

Which of the following is a list of atypical vertebrae?

Three cervical vertebrae are considered atypical compared to the other cervical vertebrae: C1. C2. C7.
...
C1 – atlas

• Lateral masses instead of a vertebral body.
• Anterior and posterior tubercles.
• Facet for the odontoid process (dens) of C2.

What separates the vertebrae in life?

Intervertebral Disc. The bodies of adjacent vertebrae are separated and united by an intervertebral disc, which provides padding and allows for movements between adjacent vertebrae. The disc consists of a fibrous outer layer called the anulus fibrosus and a gel-like center called the nucleus pulposus.

What is the last vertebrae called?

Below the sacrum is the tail end of your spine, called the coccyx or tailbone. Again, several fused vertebrae (generally 3–5) form the coccyx.

What are the 4 types of vertebrae?

There are 33 vertebrae in the human spine that are split into four regions that correspond to the curvature of the spine; the cervical, thoracic, lumbar, sacrum, and coccyx. The vertebrae of the sacrum and coccyx are fused, but those of the cervical, thoracic and lumbar regions are separated by intervertebral discs.

What is special about C7?

Unlike the other cervical vertebrae, the C7 has a large spinous process that protrudes posteriorly toward the skin at the back of the neck. This spinous process can be easily seen and felt at the base of the neck, making it a prominent landmark of the skeleton and giving the C7 the name vertebra prominens.

What is another name for the Odontoid process?

Description. The odontoid process (also dens or odontoid peg) is a protuberance (process or projection) of the Axis (second cervical vertebra). It exhibits a slight constriction or neck, where it joins the main body of the vertebra.

Which part of the spine has the most rotation?

Lumbar Spine

The lumbar vertebrae are the largest and carry most of the body's weight. This region allows more range of motion than the thoracic spine, but less than the cervical. Lumbar facet joints enable significant flexion and extension movement, but limits rotation.