  Using the spatial classification method and the structural parameters
estimated for the Gould Belt (GB) and the local Galactic disk (LGD) from a
previous paper, we have evaluated spatial membership probabilities for a sample
of O and B stars from the Hipparcos catalogue (ESA 1997) with available proper
motions and radial velocity data. Thus being able to study the space velocity
fields of both systems, we conclude that the GB and the LGD present different
statistical distributions, both in the velocity space as well as in the phase
space. In the light of the existence of both systems we analyze different
kinematic aspects in the vicinity of the Sun, and we find the GB to be
responsible for the highly negative vertex deviation found for the OB stars in
the solar neighborhood. We also find that the GB sensibly alters the estimation
of Oort's constants in the Galactic disk; thus, in order to establish
comparisons with other kinematic studies based in older stellar populations, a
careful pruning of the GB members must be performed. Further analysis of the GB
velocity field and the moving groups that contribute to it suggest the
possibility that the GB can be the result of a chance superposition of moving
groups. We propose for future investigations the dynamical analysis of these
moving groups in order to probe the origin of the GB.
