Cervical Vertebrae Features

The seventh cervical vertebra is known as the vertebra prominens because of its prominent spinous process (Fig. 5-14). The spinous process of C7 is the most prominent of the cervical region, although occasionally C6 is more prominent (C6 is the last cervical vertebra with palpable movement in flexion and extension).

What is the 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 is unique 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 (giving the C7 the name vertebra prominens).

What are the 7 cervical vertebrae?

It consists of 7 bones, from top to bottom, C1, C2, C3, C4, C5, C6, and C7. In tetrapods, cervical vertebrae (singular: vertebra) are the vertebrae of the neck, immediately below the skull.

Do cervical vertebrae have spinous processes?

The spinous process of a typical cervical vertebra is short and bifid posteriorly. It is bifid because it develops from two separate secondary centers of ossification. This morphology is unique to cervical spinous processes.

What are the features of thoracic vertebrae?

The characteristic feature of thoracic vertebrae is the presence of joints that articulate with ribs. A mid-thoracic vertebra (shown here) has two joint facets on the vertebral body for the heads of adjacent ribs, and a third joint facet on the transverse process for the neck of a rib.

Which mystery vertebra is a cervical vertebra describe two features that helped you determine this?

Two features that help me determine cervical vertebra has transverse foramen as well as a bifurcated spinous process.

What is the first cervical vertebrae called?

atlas: the first cervical vertebra (C1), lying directly under the skull, through which the head articulates with the neck.

Why is the cervical vertebrae the smallest?

The cervical vertebrae are the smallest and most delicate simply because they do not need to be larger and thicker. With the exception of the coccyx, which is a vestigial structure, the vertebrae become larger and stronger as one moves down the spine. This is because they have to support progressively more weight.

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.”

What’s below C7 spine?

The spinal nerve C8 extends from the spinal column from below the C7 vertebra and between it and the T1 vertebra. This spinal nerve serves as both a sensory root and motor root.

What does C7 vertebrae control?

C7 helps control the triceps (the large muscle on the back of the arm that straightens the elbow) and wrist extensor muscles. 1,3. The C7 dermatome goes down the back of the arm and into the middle finger.

What are the 5 types of vertebrae?

Vertebrae. As mentioned above, our vertebrae are numbered and divided into five regions: cervical, thoracic, lumbar, sacrum, and coccyx.

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.

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.

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