There is rotation of head around the dens of the axis. Dens is actually derived from the body of the atlas vertebra.
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.
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 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.
The atlas and axis bones are found in the neck region of the spine, known as the cervical spine. The atlas bone is the topmost cervical vertebra that holds up the skull, while the axis bone is located just below the atlas and allows for rotational movement of the head.
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.
The movement is called rotation, where the head pivots around the axis of the neck to enable movement from side to side. This movement primarily involves the atlas and axis vertebrae at the top of the spine.
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.
The movement of turning the head from side to side is called rotation. This movement occurs at the joint between the first two cervical vertebrae, known as the atlas and axis. Rotation of the head allows for increased range of vision and flexibility in everyday movements.
Rotation of the head occurs between the atlas and the axis bones. These are the first two cervical vertebrae.
The atlas is the very top vertebra in your spine. The head or skull rests on it, and is allowed to move in many directions. The atlas sits upon the axis vertebra - between them, they allow much more rotational movement than do other vertebrae. Also, the actual brain stem extends down into the atlas/axis pair. The spinal cord begins at the bottom of the axis bone.
Between the atlas and the axis
Between atlas and axis
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 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.
The atlas and axis bones are found in the neck region of the spine, known as the cervical spine. The atlas bone is the topmost cervical vertebra that holds up the skull, while the axis bone is located just below the atlas and allows for rotational movement of the head.
The atlas articulates with the axis. The atlas is the first cervical vertebra and articulates with the skull superiorly, and the axis (the second cervical vertebra) inferiorly. The joint between the atlas and axis, dubbed the atlanto-axial joint, is responsible for the increased range of motion of the skull (turning your head left/right, and nodding up/down).The order of the atlas and axis can be remembered because, beginning from the skull, these two cervical vertebrae are in alphabetical order (aTlas then aXis).
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.