  One of the puzzling characteristics of the pseudogap phase of high-$T_c$
cuprates is the nodal-antinodal dichotomy. While the nodal quasiparticles have
a Fermi liquid behaviour, the antinodal ones show non-Fermi liquid features and
an associated pseudogap. Angle-resolved photoemission spectroscopy and
electronic Raman scattering are two valuable tools which have shown universal
features which are rather material-independent, and presumably intrinsic to the
pseudogap phase. The doping and temperature dependence of the Fermi arcs and
the pseudogap observed by photoemission near the antinode correlates with the
non-Fermi liquid behaviour observed by Raman for the B$_{1g}$ mode. In
contrast, and similar to the nodal quasiparticles detected by photoemission,
the Raman B$_{2g}$ mode shows Fermi liquid features. We show that these two
experiments can be analysed, in the context of the $t$-$J$ model, by
self-energy effects in the proximity to a d-wave flux-phase order instability.
This approach supports a crossover origin for the pseudogap, and a scenario of
two competing phases. The B$_{2g}$ mode shows, in an underdoped case, a
depletion at intermediate energy which has attracted a renewed interest. We
study this depletion and discuss its origin and relation with the pseudogap.
