RT Book, Section A1 Ropper, Allan H. A1 Samuels, Martin A. A1 Klein, Joshua P. SR Print(0) ID 57616056 T1 Chapter 8. Pain T2 Adams and Victor's Principles of Neurology, 10e YR 2014 FD 2014 PB The McGraw-Hill Companies PP New York, NY SN 978-0071794794 LK neurology.mhmedical.com/content.aspx?aid=57616056 RD 2023/03/21 AB Pain is an important sign of illness, and it stands preeminent among all the sensory experiences by which humans judge the existence of disease within themselves. Indeed, pain is the most common medical symptom. Relatively few diseases do not have a painful phase and in many, pain is a characteristic without which diagnosis must be in doubt.