"FRYETTE'S LAWS"

In Greenman PE. Principles of Manual Medicine. Baltimore: Williams and Wilkins; 1989:58-60.

1. TYPE I COUPLED MOTION
   • (LATERAL FLEXION AND ROTATION TO OPPOSITE SIDES)

   • OCCURS WHEN PERSON STANDS WITH NORMAL AP SPINAL CURVES.

2. TYPE II COUPLED MOTION
   • (LATERAL FLEXION AND ROTATION TO SAME SIDE)

   • OCCURS WHEN NORMAL AP MECHANICS ARE ALTERED, WHEN SPINE IS IN FLEXION OR EXTENSION.