How can you distinguish between typical and atypical cervical vertebrae?
How can you distinguish between typical and atypical cervical 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.
Which cervical vertebrae are atypical and atypical?
C1 and C2 are considered atypical vertebrae because they have some distinguishing features compared to the rest of the cervical spine. The two vertebrae just below the skull are C1 (the atlas) and C2 (the axis).
What is meant by typical and atypical cervical vertebrae?
The key difference between typical and atypical vertebrae is that typical vertebrae consist of all basic components of a vertebra while atypical vertebrae are the vertebrae that have modified structure due to their position and function.
How are C1 and C2 different from other cervical vertebrae?
C1 and C2 vertebrae. The C1 vertebra, also called atlas, is shaped like a ring. The C2 vertebra has an upward-facing long bony process called the dens. The dens forms a joint with the C1 vertebra and facilitates its turning motions, thereby allowing the head to turn in different directions.
What is a typical vertebrae?
Description. 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.
What is 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.
Why is C1 and C2 atypical?
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.
Why is C2 atypical?
The axis (C2) is unique with an odontoid process (the dens) projecting from its superior surface. The vertebra prominens (C7) has the longest spinous process of all cervical vertebrae. It is also non-bifid. These features give rise to its name.
How are the atlas and axis vertebrae morphologically different from typical vertebrae?
The main difference between atlas and axis vertebrae is that atlas is the first cervical vertebra, which supports the skull whereas axis is the second cervical vertebra, which forms the pivot upon the atlas. Furthermore, atlas help to hold the head upright while axis allows the head to turn side to side.
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 is the significance of the C3 C4 and C5 vertebrae?
The Relationship Between the C3, C4, & C5 Vertebrae These vertebrae protect the spinal cord running through the cervical region of the spine, as well as provide support for the neck and head. The C3, C4, & C5 vertebrae form the midsection of the cervical spine.