The mechanisms of generation of capacitance current harmonics arising from
bilayer electrostriction are investigated theoretically in the case when fi
xed charges or dipoles are located inside the bilayer, If the elastic prope
rties of the bilayer are inhomogeneous in a transversal direction, these ch
arges or dipoles affect substancially the amplitude A(2) of the second curr
ent harmonic and accordingly the magnitude of compensatory constant voltage
V-C, which should be applied to the membrane to reduce A(2) to zero, In me
mbranes whose Young's modulus is minimum at the carter of bilayer the depen
dence of V-C on depth of immersion of the charge x(A) into the bilayer repr
esents a function with alternating signs, which is reduced to zero at the c
enter of bilayer, In the case of a dipole source immersed into the bilayer,
the appropriate dependence is oscillating as well, and its shape is a deri
vative of the corresponding dependence of V-C for fixed charges with respec
t to a coordinate, Possible applications of the results are discussed.