Is the atlas part of the axial skeleton?
The axial skeleton consists of four types of vertebrae (Figure 5.4). Most anteriorly is a single cervical vertebra, the atlas, that articulates with the occipital condyles of the skull.
What type of bone is the atlas C1?
cervical vertebrae
The atlas bone is the first of seven cervical vertebrae (vertebra cervicalis I or C1). It supports the weight of the skull. The name for the bone was derived from a deity of Greek mythology called Atlas, who supported the heavens.
What does the atlas C1 vertebrae do?
The C1 vertebra, known as the atlas, is the superior-most vertebra in the spinal column. It plays vital roles in the support of the skull, spinal cord, and vertebral arteries and provides attachment points for several muscles of the neck.
What is unique about the atlas C1?
The atlas (plural: atlases) is the first cervical vertebra, commonly called C1. It is an atypical cervical vertebra with unique features. It articulates with the dens of the axis and the occiput, respectively allowing rotation of the head, and flexion, extension and lateral flexion of the head.
What is the Atlas bone in the neck?
Anatomical terms of bone In anatomy, the atlas (C1) is the most superior (first) cervical vertebra of the spine and is located in the neck. It is named for Atlas of Greek mythology because, just as Atlas supported the globe, it supports the entire head.
What is Atlas vertebrae?
atlas: the first cervical vertebra (C1), lying directly under the skull, through which the head articulates with the neck. The main connection to the vertebra below is a pivot around the odontoid process that is an upward projection of the body of the second cervical vertebra.
What is cervical vertebrae 1 C1 called?
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 the C1 vertebra called?
atlas
The upper cervical spine consists of the atlas (C1) and the axis (C2). These first 2 vertebrae are quite different from the rest of the cervical spine (see the image below).
What happens when your C1 is out of place?
If the C1 or C2 vertebra is out of place, they can be placing undue pressure on the brainstem, causing it to send improper signals to the brain. The brain may think the body is in motion when it is not actually moving, leading to the symptoms of vertigo.
What does the C1 nerve control?
C1, C2, and C3 (the first three cervical nerves) help control the head and neck, including movements forward, backward, and to the sides.
What is the C1 vertebra?
The C1 and C2 vertebrae are the first two vertebrae at the top of the cervical spine. Together they form the atlantoaxial joint, which is a pivot joint. The C1 sits atop and rotates around C2 below. More of the head’s rotational range of motion comes from C1-C2 than any other cervical joint.
How is the atlas vertebra different from other cervical 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.
Where does the Atlas meet the C2 vertebra?
The posterior of the anterior arch meets the odontoid process of the C2 vertebra (axis) to form the median atlantoaxial joint. On either side of the anterior arch are the lateral masses, which are the widest regions of the atlas.
Why is the C1 called the first cervical vertebra?
The C1, or first cervical vertebra, is commonly called the atlas due to its unique position in the spine.
Where is the Atlas located in the spinal column?
The atlas is one of the two upper cervical vertebrae, also known as C1, which is the topmost vertebra of the spinal column. It is the vertebra that is in contact with the occipital bone, a flat bone located at the back portion of the head.