A sacral dysfunction around a horizontal axis is classified as which of the following?

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Multiple Choice

A sacral dysfunction around a horizontal axis is classified as which of the following?

Explanation:
Movement of the sacrum about the horizontal (transverse) axis corresponds to flexion/extension of the sacrum, which is a normal, physiologic plane of motion within the pelvic ring and the primary respiratory mechanism. Therefore a sacral dysfunction around that axis is classified as physiologic because it involves standard, expected motion rather than a pathologic or abnormal restriction. The other options don’t fit because this axis defines a normal range of motion, and labeling it non-physiologic or unknown wouldn’t reflect its inherent, routine role in sacral mechanics.

Movement of the sacrum about the horizontal (transverse) axis corresponds to flexion/extension of the sacrum, which is a normal, physiologic plane of motion within the pelvic ring and the primary respiratory mechanism. Therefore a sacral dysfunction around that axis is classified as physiologic because it involves standard, expected motion rather than a pathologic or abnormal restriction. The other options don’t fit because this axis defines a normal range of motion, and labeling it non-physiologic or unknown wouldn’t reflect its inherent, routine role in sacral mechanics.

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