Which term describes the ability to move the spine without resistance?

The term that describes the ability to move the spine without resistance is "normal motion." This concept refers to the physiological range of motion that allows for smooth, unrestricted movement of the spine's vertebrae during different activities such as bending, twisting, and flexing. Normal motion implies that all the biomechanical structures, including muscles, ligaments, and joints, are functioning properly, allowing the spine to move fluidly and without pain or restriction.

Understanding normal motion is crucial in osteopathic practice as it serves as a benchmark for assessing any alterations in spinal mobility. When normal motion is present, it indicates healthy biomechanics; when absent, it could signify an underlying issue, prompting further examination and potential osteopathic treatment to restore balance and function.

The other options such as somatic dysfunction, articular restriction, and transverse mobility refer to various conditions affecting mobility or specific types of motion but do not encompass the broader and healthy state of movement that normal motion represents.