The joint present between the first and second vertebrae is called the atlantoaxial joint.
Understanding the Atlantoaxial Joint
The atlantoaxial joint is a crucial joint located in the upper neck, connecting the first (atlas) and second (axis) cervical vertebrae. According to the reference provided, it's often referred to as the "map book and pivot" because it allows for significant rotational movement of the head.
Key Features:
- Location: Between the first (atlas or C1) and second (axis or C2) cervical vertebrae.
- Type: Rotating joint (pivot joint). The reference specifies that it is a rotating joint.
- Function: Primarily responsible for the rotational movement of the head. Approximately 50% of neck rotation occurs at this joint.
- Components: Involves several ligaments and bony structures that stabilize the joint and allow for controlled movement.
Importance of the Atlantoaxial Joint
The atlantoaxial joint is essential for activities like:
- Looking to the left or right.
- Shaking your head "no."
- Scanning your environment visually.
Damage or instability in this joint can severely limit neck movement and potentially lead to neurological problems.
