Can you have 8 cervical vertebrae?

There are 31 pairs of spinal nerves (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal). Because there are only seven cervical vertebrae, the first seven cervical nerves exit above the same numbered cervical vertebrae.

Can you be born with extra vertebrae?

Having a sixth lumbar vertebrae in your spine is uncommon, but far from extraordinary. About 10\% of the population has an extra bone in this region. While additional vertebrae don’t typically affect your health, they can complicate treatment for spinal cord injuries.

Do some people have extra cervical vertebrae?

About 1 in 200 people are born with an extra rib called a cervical rib. Because this is something that you are born with, it is known as a congenital condition. At the back, this rib connects to the seventh cervical vertebra in your neck.

Do all mammals have 8 cervical vertebrae?

Nearly all mammals have the same number of cervical vertebrae no matter how long or short their necks are – humans, giraffes, mice, whales, and platypuses all have exactly seven cervical vertebrae.

Why are there 8 cervical pairs instead of 7?

There are only 7 cervical vertebrae but 8 cervical nerves because cervical nerve 1 (C1) comes out rostral to the first cervical vertebra and cervical nerve 8 (C8) comes out caudal to the seventh cervical vertebra.

Which have more cervical vertebrae a human or a giraffes?

Even though the neck of a giraffe can be eight feet long and weigh up to 600 pounds, they only have seven neck vertebrae – the same number of neck bones that humans have! Their long necks also help them spot distant predators.

Is an extra vertebrae genetic?

While only around 10 percent of adults have a spinal abnormality due to genetics, a sixth lumbar vertebra is one of the more common abnormalities.

What is an extra vertebrae called?

Most people have five vertebrae in their lumbar (lower back) region, which are named L1 to L5. However, some people possess an additional lumbar vertebra located below the L5. This extra vertebra, known as the L6, is called a transitional vertebra.

How common are bilateral cervical ribs?

Cervical ribs are accessory ribs arising from the 7th cervical vertebrae. They are an anatomical variant discovered most times incidentally during a routine chest x-ray study. They are commoner in females, bilateral in 80\% though often asymmetric and occur in about 0.5\% of the population 1.

Is KFS hereditary?

In most cases, Klippel Feil syndrome (KFS) is not inherited in families and the cause is unknown. In some families, KFS is due to a genetic alteration in the GDF6, GDF3 or MEOX1 gene and can be inherited. When KFS is caused by mutations in the GDF6 or GDF3 genes, it is inherited in an autosomal dominant manner.

Are there 7 or 8 cervical vertebrae?

In the cervical segments, there are 7 cervical vertebrae and 8 cervical nerves (Figure 3.2). C1-C7 nerves exit above their vertebrae whereas the C8 nerve exits below the C7 vertebra. It leaves between the C7 vertebra and the first thoracic vertebra.

How is there 8 cervical nerves?

There are 8 pairs of spinal nerves in the cervical spine, labeled C1 to C8. Each one is named after the vertebra beneath it, except the C8 nerves, which are above the T1 vertebra.