Which bone is the widest in the cervical spine?

Which bone is the widest in the cervical spine?

• A. C1
• B. C2
• C. C4
• D. C3

Answer: (C)

In this context, “widest” refers to the transverse width of the vertebral body (the side-to-side dimension), not the size of the spinal canal. The atlas (the very first cervical vertebra) is ring-like and lacks a typical body, so it isn’t the widest. The axis has a prominent dens, but its body isn’t the widest of the typical cervical vertebrae. Among the standard cervical vertebrae in the mid-neck, the bone that shows the greatest transverse width of its vertebral body is the one located in the middle of the cervical curve—the fourth cervical vertebra. Its body has the largest transverse diameter in this set, giving it the widest footprint. Note that measurements can vary by source and method, but this question uses the convention that the widest cervical vertebra is the mid-cervical one in that region.

In this context, “widest” refers to the transverse width of the vertebral body (the side-to-side dimension), not the size of the spinal canal. The atlas (the very first cervical vertebra) is ring-like and lacks a typical body, so it isn’t the widest. The axis has a prominent dens, but its body isn’t the widest of the typical cervical vertebrae. Among the standard cervical vertebrae in the mid-neck, the bone that shows the greatest transverse width of its vertebral body is the one located in the middle of the cervical curve—the fourth cervical vertebra. Its body has the largest transverse diameter in this set, giving it the widest footprint. Note that measurements can vary by source and method, but this question uses the convention that the widest cervical vertebra is the mid-cervical one in that region.