Camenen, Y.Angioni, C.Bortolon, A.Duval, B. P.Fable, E.Hornsby, W. A.Mcdermott, R. M.Na, D. H.Na, Y-SPeeters, A. G.Rice, J. E.2017-03-272017-03-272017-03-27201710.1088/1361-6587/aa543ahttps://infoscience.epfl.ch/handle/20.500.14299/135847WOS:000394591300001The progress made in understanding spontaneous toroidal rotation reversals in tokamaks is reviewed and current ideas to solve this ten-year-old puzzle are explored. The paper includes a summarial synthesis of the experimental observations in AUG, C-Mod, KSTAR, MAST and TCV tokamaks, reasons why turbulent momentum transport is thought to be responsible for the reversals, a review of the theory of turbulent momentum transport and suggestions for future investigations.plasmatokamakintrinsic rotationmomentum transportturbulencetext::journal::journal article::research article