During cranial extension, what happens to the anterior-posterior diameter of the cranium?

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Prepare for the OMM 6 Cranial Evaluation and Treatment Test. Use flashcards and multiple-choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

During cranial extension, what happens to the anterior-posterior diameter of the cranium?

Explanation:
During cranial extension, the skull lengthens from front to back. The bones at the base of the skull move so that the anterior portion advances while the posterior base lengthens, increasing the anterior-posterior diameter. This is the opposite of flexion, where the anterior-posterior dimension decreases as the base comes closer together. In extension, the reciprocal movements of the sphenoid and occipital regions expand the skull in the AP direction, reflecting the cranial rhythmic motion.

During cranial extension, the skull lengthens from front to back. The bones at the base of the skull move so that the anterior portion advances while the posterior base lengthens, increasing the anterior-posterior diameter. This is the opposite of flexion, where the anterior-posterior dimension decreases as the base comes closer together. In extension, the reciprocal movements of the sphenoid and occipital regions expand the skull in the AP direction, reflecting the cranial rhythmic motion.

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