1. A system configured to stimulate a neural tissue including a first type of neurons and a second type of neurons, the system comprising: a power source; a stimulating element powered by the power source, the stimulating element structured to be positioned in proximity to the neural tissue; and a controller in communication with the stimulating element, the controller including a storage medium on which is stored program code such that, when the program code is executed by a processor, the program code causes the processor to: define a waveform characterizing an electrical stimulus, the waveform including an amplitude-modulated wave of the electric stimulus, and control the stimulating element to apply the electrical stimulus having the defined waveform to selectively activate the first type of neurons while leaving the second type of neurons one of substantially unaffected and suppressed in response to the electrical stimulus.