Which test determines AA hypermobility?

The Transverse Ligament Stress Test is specifically designed to evaluate the integrity of the transverse ligament, which plays a critical role in maintaining stability and proper alignment of the atlantoaxial (AA) joint. This ligament helps prevent excessive movement or hypermobility between the first and second cervical vertebrae (the atlas and the axis), which can lead to potential instability and various complications.

During the test, the clinician applies a gentle anterior pressure to the patient's head while assessing for any signs of instability, such as excessive movement or neurological symptoms. If the test reveals an increase in mobility or brings about symptoms, it indicates hypermobility at the AA joint due to a compromise in the transverse ligament.

This assessment is particularly important in conditions that predispose individuals to instability at the AA joint, such as Down syndrome or rheumatoid arthritis. By identifying hypermobility in this area, clinicians can formulate appropriate treatment plans to mitigate risks associated with cervical spine instability.

The other options, while relevant to cervical examination, do not specifically assess for AA hypermobility. The Sharp Purser Test is focused on stability and potential cranial settling or dislocation of the atlas on the axis but does not directly assess hypermobility. The Cervical Flexion Rotation Test assesses the