Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

What is the first of Fryette's laws regarding spinal motion?

1. In neutral position, sidebending and rotation are opposite

2. In non-neutral position, sidebending and rotation are opposite

3. All spinal motion occurs in multiple planes

4. Motion is strictly aligned with transverse movement

The correct answer is: In neutral position, sidebending and rotation are opposite

Fryette's first law states that in the neutral position of the spine, when the spine is neither flexed nor extended, sidebending and rotation occur in opposite directions. This principle is fundamental in osteopathic manipulative treatment and helps practitioners understand how the vertebral segments interact during motion. In this neutral position, the mechanics of the thoracic and lumbar spine demonstrate that as a segment bends to one side (sidebending), the corresponding vertebra rotates towards the opposite side. This concept is essential when diagnosing and treating spinal dysfunctions, as it guides the practitioner in determining the relationship between different spinal segments. Understanding this law is crucial because it lays the groundwork for the principles of spinal motion and manipulation in osteopathic medicine. It emphasizes the interconnectedness of spinal movements and serves as a foundational concept for advanced osteopathic techniques. In contrast, the other statements regarding spinal motion do not capture this specific relationship outlined in Fryette's first law, which is why the chosen response is the most accurate representation of the principle.