Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

In bilateral sacral shear, what does a negative spring test indicate?

1. Inherent motion of CNS

2. Mobility of sacrum between ilia

3. Mobility of cranial bones

4. Movement of CSF

The correct answer is: Mobility of sacrum between ilia

A negative spring test in the context of bilateral sacral shear indicates that there is mobility of the sacrum between the ilia. In a negative spring test, the practitioner applies pressure on the sacrum, and if the sacrum moves freely and springy, it suggests that the sacrum is mobile and not restricted in its movement. This finding is crucial in assessing for dysfunctions in the sacroiliac joints and understanding the relationship between the sacrum and the ilium. The mobility of the sacrum is an essential aspect of osteopathic manipulative treatment, as restrictions in this area can lead to various physiological consequences and may affect patients' overall function. The negative spring test, therefore, supports the idea that there is no significant restriction in the sacrum’s ability to move, indicating a healthy relationship between the sacrum and ilium. Understanding the implications of this test helps practitioners in diagnosing and treating conditions related to sacral motion and pelvic alignment effectively.