  We present a complete study of the leading-twist quark Wigner distributions
in the nucleon, discussing both the $\mathsf T$-even and $\mathsf T$-odd
sector, along with all the possible configurations of the quark and nucleon
polarizations. We identify the basic multipole structures associated with each
distribution in the transverse phase space, providing a transparent
interpretation of the spin-spin and spin-orbit correlations of quarks and
nucleon encoded in these functions. Projecting the multipole parametrization of
the Wigner functions onto the transverse-position and the transverse-momentum
spaces, we find a natural link with the corresponding multipole
parametrizations for the generalized parton distributions and
transverse-momentum dependent parton distributions, respectively. Finally, we
show results for all the distributions in the transverse phase space,
introducing a representation that allows one to visualize simultaneously the
multipole structures in both the transverse-position and transverse-momentum
spaces.
