What is the atlas and axis?

Medical Definition of Atlas and axis joint

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.

Beside above, where is the atlas and axis? Without them, head and neck movement would be impossible. The atlas and axis vertebrae are the two most superior bones in the vertebral column, and they are part of the seven cervical vertebrae. The atlas is the top-most bone, sitting just below the skull; it is followed by the axis.

Correspondingly, how does the atlas and axis work?

The atlas and axis are specialized to allow a greater range of motion than normal vertebrae. The atlanto-occipital joint allows the head to nod up and down on the vertebral column. The dens acts as a pivot that allows the atlas and attached head to rotate on the axis, side to side.

What does the axis bone do?

The axis, also known as the C2 bone, creates a pivot that allows the C1, or atlas, to rotate. This action gives the head and neck a greater range of motion from side to side. The pivoting motion occurs on part of the bone called the dens, a tooth-like upright section on the bone.

What is the significance of the atlas and axis?

The atlas is the first cervical (neck) vertebra which is just under the head; it is named for Atlas, the Greek god who supported the world on his shoulders. The axis is the second cervical vertebra; it has what is called the odontoid process about which the atlas rotates. It allows the head turn from side to side.

What feature is unique to the axis?

One of the most prominent features of the axis bone is a superior, tooth-like projection called the odontoid process (or dens). articulates with the anterior arch of the atlas bone, where they form a pivot joint. rotates side-to-side, the atlas bone rotates around the peg-like odontoid process.

What is a pivot joint?

Pivot joint, also called rotary joint, or trochoid joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament.

What is special about the second cervical vertebra called the Axis?

Vertebra, second cervical: The second cervical vertebra is called the axis. It is so-named because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of the second cervical vertebra. The joint between the axis and atlas is a pivot type of joint. It allows the head turn.

What is your neck joint called?

The pivot joint in your neck allows you to turn your head from side to side.

What type of bone is the Atlas?

vertebrae

What does the Atlas articulate with?

Articulations. Superiorly the atlas articulates with the occiput to form the Atlanto-occipital joint which allows the head to nod up and down on the vertebral column. Inferiorly the atlas articulates with the dens which acts as a pivot that allows the atlas and attached head to rotate on the axis.

Is the neck considered a joint?

Pivot joints are found in your neck vertebrae, while hinge joints are located in your elbows, fingers, and knees.

What does your c2 control?

What is a C2 Vertebra? The C2 vertebra is the axis which the C1 vertebra pivots around and lets us move our skulls from side to side in a horizontal motion. Like the C1 vertebra, a C2 vertebra has a greater degree of motion than other vertebrae that are lower on the spinal column.

Why is c2 called axis?

C2 (cervical vertebra): C2 is the symbol for the second cervical vertebra, which is also called the axis. It is so-named because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of the second cervical vertebra. The Latin word “axis” means axle or pole.

Is c2 an axis?

In anatomy, the second cervical vertebra (C2) of the spine is named the axis (from Latin axis, “axle”) or epistropheus. By the atlanto-axial joint, it forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates.

Which bone is called Yes bone?

✌?✌? hey, ➡?Atlas bone is also called Yes bone because it is responsible for the yes movement that we can do..

What features of the atlas and axis are unique?

The atlas and axis have additional features that mark them apart from the other cervical vertebrae. The atlas is the first cervical vertebra and articulates with the occiput of the head and the axis (C2). It differs from the other cervical vertebrae in that it has no vertebral body and no spinous process.

What is the top vertebrae called?

The spine is made up of 24 segments called vertebrae. These bones are stacked on top of one another. There are seven vertebrae in the neck called cervical vertebrae. These are often referred to as C1 through C7 (top to bottom). The skull sits atop C1.