Co-founder of The Metastabilian Movement. Artist ~ Scientist, Musician, Writer and Metastabilian Muse. Ph.D. Neuropharmacology, UCHSC, Denver. Since 1991, Engstrøm has worked with eminent neuroscientist J. A. Scott Kelso to develop a conceptual link between Coordination Dynamics and Complementary Pairs. Kelso and Engstrøm co-wrote the book on the subject, The Complementary Nature (MIT Press, 2006). It presents a novel philosophy of complementary pairs grounded in the science of coordination called Coordination Dynamics. It also introduces a new name and meaning for the '~' text symbol, the squiggle sign, which symbolizes the complementary nature of given pairs of complementary aspects; it also introduces the The Squiggle Sense to mean a psychological sixth sense of The Complementary Nature.