CSI is the seminal text by Dr. G. Dallas Hancock on structural cranial techniques for correcting the Universal Compensatory Patterns. The human body is asymmetrical in structure and function, the result of two chronic cranial patterns: a right torsion and a left lateral strain. These patterns result in global neuromusculoskeletal dysfunctions, including lateral sacral tippage, a compensatory scoliosis, and global imbalances in the function of paired muscles. The cranial treatment procedures presented in this manual also eliminate three retained primitive reflexes: ATNR, STNR and TLR. This text details the cranial Master Releases, direct techniques that were part of Dr. Hancock’s Ph.D. work. Detailed descriptions of each procedure are accompanied by illustrations. Patients’ chronic distortions release, pain abates, and muscle-function testing demonstrates beneficial changes that can last for many years.