Abstract: Interior door handle assemblies are provided for motor vehicles. An exemplary interior door handle assembly may include a helical cam, an inertia interlock, or both. The helical cam may be provided at an interface between a handle and a cam slider of the interior door handle assembly and may be configured for converting a user-actuated rotation of the handle to linear displacement of the cam slider. The inertia interlock may substantially prevent a non-user actuated inertial rotation of the handle that can result from acceleration forces acting on the assembly.