  We study hidden-flavor pentaquarks, $Q\bar Q qqq$, based on a constituent
quark-model with a standard quark-quark interaction that reproduces the
low-energy meson and baryon spectra. We make use of dynamical correlations
between the heavy quarks arising from the Coulomb-like nature of the
short-range interaction. A detailed comparison is made with other results in
the literature and with experimental data. Our results show a different pattern
for open-flavor and hidden-flavor pentaquarks, as suggested by the data.
Further implications about the existence of quarkonia bound to nuclei are
discussed.
