The influence of intramolecular as well as intermolecular interactions on the dynamics of micellized mixtures of decyldimethylammoniopropanesulfonate, a zwitterionic surfactant with an anionic surfactant (lithium decyl sulfate) and a cationic surfactnat (decylammonium acetate), have been studied by 13C multifield NMR relaxation. The experimental results, as analyzed by a two-step spin relaxation model, suggest that, in contrast to liquid crystalline systems, intramolecular interactions alone determine the order parameter profile and the local chain dynamics.