The atlantoaxial joint is a pivotal joint located between the first cervical vertebra (atlas) and the second cervical vertebra (axis), allowing for the majority of head rotation. Its stability is primarily maintained by the transverse ligament of the atlas, and it is crucial for neck mobility and alignment.

Atlantoaxial Joint

atlantoaxial joint

cervical vertebra

first cervical vertebra

second cervical vertebra

Head rotation is the movement of the head around its vertical axis, primarily facilitated by the cervical vertebrae and associated muscles. This motion is crucial for visual orientation, balance, and coordination, allowing humans and animals to track moving objects and maintain spatial awareness.

head rotation

The transverse ligament of the atlas is a critical stabilizing structure within the atlantoaxial joint, preventing excessive anterior translation of the atlas on the axis. Its integrity is essential for maintaining spinal cord protection and proper neck movement, and its disruption can lead to severe neurological consequences.

transverse ligament of the atlas

Neck mobility refers to the range of motion and flexibility of the cervical spine, which is crucial for daily activities and overall spinal health. Maintaining good neck mobility can prevent pain, reduce the risk of injury, and improve posture and functional movement.

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