  In this work we analyze the evolution of the quantum Mixmaster cosmological
model within an effective approach. In particular, we study the behaviour of
the scale factor and anisotropies of the theory, and determine how it deviates
from its classical counterpart due to quantum back-reaction. Remarkably, we
determine that the effective evolution avoids the initial singularity. The
semiclassical dynamic of the system is obtained from a Hamiltonian in an
extended phase space, whose classical position and momentum variables are the
expectation values of the corresponding quantum operators, as well as of
quantum dispersions and correlations of the system, and is in this framework
that we obtain semiclassical one-particle trajectories.
