What does Fryette's second law state about spinal motion in full flexion or extension?

Fryette's second law pertains to the principles of spinal mechanics, specifically addressing how the vertebrae behave when positioned in a state of full flexion or extension. According to this principle, when the spine is in full flexion or extension, the movement of one vertebra relative to another is characterized by rotation and side-bending occurring in the same direction. This means that if a vertebra rotates to the right, it will also side-bend to the right, demonstrating a coupling of motion.

This principle is significant in understanding spinal biomechanics, particularly in the evaluation and treatment of spinal dysfunctions. In cases of pathological conditions, such as scoliosis or certain forms of disc herniation, recognizing how the vertebrae move in relation to one another can aid in creating effective treatment plans.

The other options do not accurately reflect the mechanics described by Fryette's second law. For instance, the statement that rotation and side-bending occur in opposite directions misrepresents the principle and applies more to the first law, which pertains to neutral mechanics. The option indicating that rotation and side-bending do not occur contradicts the fundamental observations of spinal kinematics, and discussing the neutral position's impact on motion does not relate specifically to the laws governing