  We present a method to obtain response functions in the random phase
approximation (RPA) based on a residual interaction described in terms of
Landau parameters with central plus tensor contributions. The response
functions keep the explicit momentum dependence of the RPA, in contrast with
the traditional Landau approximation. Results for symmetric nuclear matter and
pure neutron matter are presented using Landau parameters derived from
finite-range interactions, both phenomenological and microscopic. We study the
convergence of response functions as the number of Landau parameters is
increased.
