Аннотация:This study investigates the role of case in nominal wordform processing. Prior studies on Serbian, Finnish and German (e.g., Feldman, Fowler 1987; Laine et al., 1999; Clahsen et al., 2001) assume that the citation form is processed faster than other inflectional variants, but they are inconclusive with respect to whether oblique case form behave alike or not. To this aim, we conducted a progressive demasking experiment with Russian singular nouns. We claim that the division of case forms into nominative and oblique is not sufficient and discuss possible reasons for observed results.