  We present results on the nucleon axial and induced pseudo-scalar form
factors using an ensemble of two degenerate twisted mass clover-improved
fermions generated at the physical value of the pion mass. We evaluate the
isovector and the isoscalar, as well as, the strange and the charm axial form
factors. The disconnected contributions are evaluated using recently developed
methods that include deflation of the lower eigenstates, allowing us to extract
the isoscalar, strange and charm axial form factors. We find that the
disconnected quark loop contributions are non-zero and particularly large for
the induced pseudo-scalar form factor.
