During cranial extension, what happens to the transverse diameter of the cranium?

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Study for the OMM 6 – Cranial Evaluation and Treatment Test. Explore cranial anatomy and osteopathic principles with flashcards and multiple choice questions. Prepare comprehensively to excel in your exam!

Multiple Choice

During cranial extension, what happens to the transverse diameter of the cranium?

Explanation:
During cranial extension, the cranial mechanism shifts so that the skull vault tends to come slightly closer across the width. In this phase, the parietal regions approximate toward the midline and the transverse dimension of the cranium decreases. This pattern sits opposite flexion, where the width tends to widen. The change is small but consistent with the extension end of the flexion-extension spectrum, so the transverse diameter becomes smaller during extension.

During cranial extension, the cranial mechanism shifts so that the skull vault tends to come slightly closer across the width. In this phase, the parietal regions approximate toward the midline and the transverse dimension of the cranium decreases. This pattern sits opposite flexion, where the width tends to widen. The change is small but consistent with the extension end of the flexion-extension spectrum, so the transverse diameter becomes smaller during extension.

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