Method and apparatus for selective nerve stimulation

A system, comprising:

• a plurality of ultrasound transducers, each ultrasound transducer being adapted to be positioned to direct an ultrasound signal toward a neural target;
• a controller adapted to deliver an electrical signal to each of the plurality of ultrasound transducers to generate the ultrasound signal toward the neural target, the controller being adapted to control a phase of the electrical signal to each of the plurality of ultrasound transducers to cause resulting ultrasound signals from the plurality of ultrasound transducers to constructively interfere at the neural target and provide sufficient energy to stimulate the neural target.

A method for stimulating a neural target, comprising:

• generating a first energy wave from a first position toward the neural target, the first energy wave having a first phase and having a first predetermined amplitude insufficient to stimulate the neural target by itself;
• and
• generating a second energy wave from a second position toward the neural target, the second energy wave having a second phase and having a second predetermined amplitude insufficient to stimulate the neural target by itself, the first phase of the first energy wave and the second phase of the second energy wave being selected to provide constructive interference at the neural target for use in delivering an energy capable of stimulating the neural target.