1. A method of treating Parkinson's disease (PD) in a patent, the method comprising: generating electrical stimulation pulses from a pulse generator, the electrical stimulation pulses comprising a plurality of groups of pulses occurring according to a burst frequency, wherein (i) multiple pulses are generated within each respective group according to a pulse repetition frequency, (ii) adjacent groups within the plurality of groups are spaced apart from each other in time with a substantially quiescent period, and (iii) the generating is repeated for a limited number of hours per day such that the generating is performed at most for 50% of a respective day, wherein each group in the plurality of groups is less than three (3) seconds and each quiescent period is less than one (1) minute; and applying the plurality of groups of pulses to a target neuronal population of the patient using one or more electrodes of one or more electrical leads implanted within a deep brain location of the patient, wherein (i) the one or more electrodes are within the globus pallidus internalis (GPi) or within the subthamalic nucleus (STN), and (ii) the applying causes the patient to experience a change in neuronal circuitry from a disease state that results in reduced PD-related tremor or PD-related bradykinesia in the patient while the electrical stimulation pulses are not applied.