1. A method of providing pain therapy to a patient suffering from chronic lower back pain, comprising: conveying an electrical pulsed waveform between at least one caudal electrode and spinal cord tissue including neural fibers that innervate L1-L2 dermatomes, thereby evoking action potentials that are orthodromically propagated along dorsal column (DC) neural fibers and evoking action potentials that are antidromically propagated along the DC neural fibers; and conveying sinusoidal electrical energy between at least one rostral electrode and the spinal cord tissue simultaneously with the conveyance of the electrical pulse waveform between the at least one caudal electrode and spinal cord tissue, wherein the sinusoidal electrical energy has an amplitude to affect propagation of action potentials in superficial layers of the DC neural fibers where anterior-leg innervating DC neural fibers are prevalent while minimally affecting or not affecting orthodromic propagation of action potentials in deeper lower back-innervating DC neural fibers, thereby modulating times that the action potentials orthodromically propagated along the DC neural fibers arrive at the brain of the patient allowing the patient to perceive comfortable lower back paresthesia without uncomfortable anterior leg sensations.