Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

In cranial/sacral flexion, which movement occurs?

1. Extension of midline bones

2. Internal rotation of paired bones

3. Rising of the sacral base

4. Exhalation of all bone structures

The correct answer is: Rising of the sacral base

In cranial/sacral flexion, the sacral base indeed rises, which is a key aspect of how craniosacral movement functions. This specific movement occurs as part of the cyclical patterns of craniosacral motion, where flexion involves the movement of the sacrum and its relationship with the cranial vault. During cranial flexion, the sphenoidal and occipital bones create a flexed position, leading to the lifting of the sacral base towards the cranial components. The rising of the sacral base is an integral aspect of the craniosacral rhythm, reflecting the flexion of the cranial mechanisms. The sacrum rotates in a way that complements the movements occurring at the cranial base, illustrating a harmonious interplay between cranial and sacral dynamics central to osteopathic practice. Understanding this relationship provides valuable insight into how craniosacral therapy can influence function and anatomy within these areas.