Before revision:  We observe that upon imposing the neuronal excitation/inhibition balance, although the eigenvalues remain unchanged, their stability dramatically decreases due to  strong non-orthogonality of associated eigenvectors.
After revision:  We observe that upon imposing the neuronal excitation/inhibition balance, although the eigenvalues remain unchanged, their stability dramatically decreases due to the strong non-orthogonality of associated eigenvectors.