Miniature implantable device and methods

A method for treating neurological pain, the method comprising:

• inserting an introducer needle through a percutaneous incision site on a body, the introducer needle being of gauge 18 or smaller;
• coupling a first mating feature at a distal end of an elongate member of a stylet to a second mating feature of an implantable device that is configured to receive a wireless signal and to generate one or more electrical pulses from the wireless signal for exciting a tissue within the body, wherein the implantable device further comprises:
• a cylindrical body defining a longitudinal axis of the implantable device,
• a plurality of electrodes distributed along the cylindrical body and configured to deliver the one or more electrical pulses, and
• an anchoring feature adjacent the cylindrical body and disposed proximal to the plurality of electrodes for securing the implantable device to the tissue,
• wherein the second mating feature is disposed proximal to the anchoring feature, disposed in-line with the longitudinal axis of the implantable device, and defines a proximal end of the implantable device,
• advancing the stylet and the implantable device together as an assembly to the tissue within the body through a lumen of the introducer needle;
• and
• applying the one or more electrical pulses to one or more electrodes of the plurality of electrodes of the implantable device to modulate the tissue within the body.