The disclosure is directed to techniques for shifting between two
electrode combinations. An amplitude of a first electrode combination is
incrementally decreased while an amplitude of a second, or subsequent,
electrode combination is concurrently incrementally increased.
Alternatively, an amplitude of the first electrode combination is
maintained at a target amplitude level while the amplitude of the second
electrode combination is incrementally increased. The stimulation pulses
of the electrode combinations are delivered to the patient interleaved in
time. In this manner, the invention provides for a smooth, gradual shift
from a first electrode combination to a second electrode combination,
allowing the patient to maintain a continual perception of stimulation.
The shifting techniques described herein may be used during programming
to shift between different electrode combinations to find an efficacious
electrode combination. Additionally, the techniques may be used for
shifting between different electrode combinations associated with
different stimulation programs or program sets.