What makes the atlas and axis different from all the other vertebrae?
Unlike the other vertebrae, the atlas does not have a spinous process. Instead, it is ringlike and consists of an anterior and posterior arch, as well as two lateral masses.
What is unique about atlas and axis?
The atlas and axis are specialized to allow a greater range of motion than normal vertebrae. They are responsible for the nodding and rotation movements of the head. The atlanto-occipital joint allows the head to nod up and down on the vertebral column.
What makes axis vertebrae unique?
The most distinctive characteristic of this bone is the strong Odontoid Process(also known as the “dens”) which rises perpendicularly from the upper surface of the body.It is a prominent rounded superior projection from the body. This tooth-like elevation serves a stable point around which the atlas bone rotates.
What are the characteristics that make atlas C 1 and axis C2 different from the other vertebrae?
The Atlas (the first cervical vertebra – C1) differs from the other cervical vertebrae in that it has no body or spinous process. It is comprised of two bony arches with two bony masses laterally. It articulates with the Occiput above and C2 (the Axis) below.
What is the differences between axis and atlas?
The key difference between atlas and axis vertebrae is that the atlas vertebra is the topmost vertebra which holds the skull while axis vertebra is the second topmost vertebra which provides an axis to rotate the skull and atlas vertebra when the head moves side to side.
What is the difference between thoracic and lumbar vertebrae?
The main difference between thoracic and lumbar vertebrae is that the body of the thoracic vertebrae is comparatively large whereas the body of the lumbar vertebrae is the largest body. Thoracic and lumbar vertebrae are the two types of vertebrae groups found in the middle and the lower part of the spine.
How is atlas different from axis?
Which statement best explains the atlas and axis vertebrae?
When you “stubb” your toe, what bony type are you bumping and hurting? The cervical curve of the vertebral column forms when the baby is able to hold its head up. The largest sinuses in the skull are located in the occipital bone.
What distinguishing process does the atlas possess?
What distinguishing process does the atlas possess? Does not have a vertebral body; has a bony ring instead. Also has two transverse processes called “wings.”
Which part of the spine includes the atlas and axis?
Cervical Vertebrae (C1 – C7) The cervical spine is further divided into two parts; the upper cervical region (C1 and C2), and the lower cervical region (C3 through C7). C1 is termed the Atlas and C2 the Axis. The Occiput (CO), also known as the Occipital Bone, is a flat bone that forms the back of the head.
How do C1 and C2 differ from other 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.
How can you tell the difference between C1 and C2?
The key difference between C1 and C2 is that the C1 or the atlas vertebra is the most superior vertebra of the human vertebral column while the C2 or the axis vertebra is the second topmost vertebra of the human vertebral column.