PPC/OMM Exam 1 Practice 2026 - Free PPC/OMM Practice Questions and Study Guide

CR I stands for Cranial Rhythmic Impulse, the subtle, faint, regular pulsation that practitioners palpate across the skull during cranial assessment. This rhythm is used to guide cranial treatment with the aim of improving function, and its defining feature is its gentle, consistent pattern rather than any rapid or irregular variation. It isn’t measured by imaging as a rate of cerebrospinal fluid movement, nor is it felt as a deep constant pressure; rather, it is a palpable rhythm observed at the cranial tissues. So the best description is a faint, regular rhythm felt during cranial assessment that helps direct cranial techniques to improve function.