The sternocleidomastoid pair and the splenius capitus pair act to rotate the head around the joint between the axis and the atlas.
The sternocleidomastoid pair and the splenius capitus pair act to rotate the head around the joint between the axis and the atlas.
There is rotation of head around the dens of the axis. Dens is actually derived from the body of the atlas vertebra.
The embryonic body of the atlas fuses with the axis to form the odontoid process or dens. This process helps to stabilize the joint between the atlas and axis, allowing for rotation of the head.
Actually, the first cervical vertebra is called the atlas, not the axis. The axis is the second cervical vertebra that forms a pivot joint with the atlas, allowing for rotation of the head from side to side.
The atlas is the first cervical vertebra (C1) that supports the skull and allows for nodding motions, while the axis is the second cervical vertebra (C2) that allows for rotation of the head. The atlas lacks a vertebral body and instead consists of a ring-like structure, whereas the axis has a prominent tooth-like process called the odontoid process that fits into the atlas for rotation.
The Atlas is designed to allow a nodding movement, whilst the axis below it has the odontoid peg on it to allow shaking, or rotational movement of the skull.
There is rotation of head around the dens of the axis. Dens is actually derived from the body of the atlas vertebra.
The embryonic body of the atlas fuses with the axis to form the odontoid process or dens. This process helps to stabilize the joint between the atlas and axis, allowing for rotation of the head.
Actually, the first cervical vertebra is called the atlas, not the axis. The axis is the second cervical vertebra that forms a pivot joint with the atlas, allowing for rotation of the head from side to side.
The atlas is the first cervical vertebra (C1) that supports the skull and allows for nodding motions, while the axis is the second cervical vertebra (C2) that allows for rotation of the head. The atlas lacks a vertebral body and instead consists of a ring-like structure, whereas the axis has a prominent tooth-like process called the odontoid process that fits into the atlas for rotation.
The rotation of the atlas on the axis (first two vertebrae)
The Atlas is designed to allow a nodding movement, whilst the axis below it has the odontoid peg on it to allow shaking, or rotational movement of the skull.
Two vertebrae in the cervical section of the vertebral column call the axis and the atlas.
Rotation of the head occurs between the atlas and the axis bones. These are the first two cervical vertebrae.
rotation
The axis, or second cervical vertebra (C2), articulates with two bones: the atlas (C1), which is the first cervical vertebra, and the occipital bone of the skull. The joint between the atlas and axis allows for the rotation of the head, while the connection with the occipital bone facilitates nodding movements.
rotation
Atlaswrong . the correct answer is axis (http://en.wikipedia.org/wiki/Axis_(anatomy)) "It forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates."