By Deepak Chopra, M.D., FACP, Murali Doraiswamy, MD, Professor of Psychiatry, Duke University Medical Center, Durham, North Carolina and Rudolph E. Tanzi, Ph.D., Joseph P. and Rose F. Kennedy Professor of Neurology at Harvard University, and Director of the Genetics and Aging Research Unit at Massachusetts General Hospital (MGH); Menas Kafatos, Ph.D., Fletcher Jones Endowed Professor in Computational Physics, Chapman University
When you give a red rose to your beloved on Valentine’s Day, you have every right to say, “I made this for you.” All the qualities that a rose possesses – its velvety texture, lush red color, even its thorns – are real to us because our perception makes them real. Photons of light have no color, only frequencies and wavelengths. The point of a thorn has no sharpness. The scent of a rose isn’t sweet when seen merely as airborne molecules. The reality of these specific qualities is tied to us. The brain processes electrochemical signals sent from photoreceptors in the eye to “create” the color red. Skin encapsulated mechanosensory receptors send electrochemical signals that reassure us of a solid “material” world, but the prick of a thorn is created by our brain. Indeed we now know that the brain takes into account a number of factors to choose how much pain to create; varying any one of these factors can affect how prickly the same thorn is. (more…)