  We present calculation of influence caused by nucleon Fermi motion on the
parton distributions in nuclei. Our approach is based on the model where
momenta of valence partons have some primordial distribution inside the hadron
at rest, which is either provided by a statistical considerations or calculated
using spherically symmetric Gaussian distribution with a width derived from the
Heisenberg uncertainty relation. The sea parton contribution emerges from the
similar Gaussian distribution with a width dictated by the presence of virtual
pions in hadron. We show that the influence of Fermi motion changes
substantially the nucleonic structure function inside the nucleus in the right
direction and therefore should be considered seriously in all attempts devoted
to explain the experimentally observed EMC effect for $x_{Bj} > 0.1$.
