Devices and methods for treating craniofacial pain

1. A method for treating craniofacial pain in a patient's body, the method comprising:

placing a wirelessly powered passive device through an opening into a target site in a head or neck region of the patient's body, the wirelessly powered passive device comprising one or more dipole antenna configured to receive an input signal non-inductively from an external antenna;

positioning the wirelessly powered passive device such that electrodes of the wireless powered passive device are positioned adjacent to or near a nerve at the target site; and

delivering a neural modulation to the nerve by causing one or more stimulation pulses to be applied through the electrodes on the wirelessly powered passive device; and

withdrawing an introducer device from the patient's body after the one or more stimulation pulses have been applied through the electrodes to deliver the neural modulation,

wherein the one or more stimulation pulses are created solely from electrical energy contained in the input signal, and wherein applying the one or more stimulation pulses results in substantially zero net charge.

2. The method of claim 1 , wherein placing the wirelessly powered passive device comprises:

advancing the wirelessly powered passive device through an inner lumen of an introducer with a size of 14 gauge or smaller.

3. The method of claim 1 , wherein placing the wirelessly powered passive device comprises:

placing the wirelessly powered passive device through a surgical incision made on the patient's body.

4. The method of claim 1 , wherein placing the wirelessly powered passive device comprises:

placing the wirelessly powered passive device percutaneously into the patient's body.

5. The method of claim 1 , wherein placing the wirelessly powered passive device comprises:

placing the wirelessly powered passive device subcutaneously into the patient's body.

6. The method of claim 1 , wherein positioning the wirelessly powered passive device comprises:

advancing a wirelessly powered passive device paddle to reach the nerve at the target site.

7. The method of claim 1 , wherein positioning the wirelessly powered passive device comprises:

advancing a wirelessly powered passive device that is no larger than 0.8 mm in diameter to reach the nerve at the target site.

8. The method of claim 1 , wherein causing neural modulation comprises:

causing neural modulation to a occipital nerve or branches thereof.

9. The method of claim 1 , wherein causing neural modulation comprises:

causing neural modulation to a trochlear nerve or branches thereof.

10. The method of claim 1 , wherein causing neural modulation comprises:

causing neural modulation to a nerve in the patient's body, the nerve including one of: an occipital nerve, a vagus nerve, a trigeminal nerve, a glossopharyngeal nerve, a mandibular nerve, an alveolar nerve, a lingual nerve, a maxillary nerve, a ciliary nerve, a sphenopalatine ganglion, or a supratrochlear nerve.

11. The method of claim 1 , further comprising:

using X-Ray fluoroscopy to guide positioning of the wirelessly powered passive device adjacent to or near the nerve at the target site.

12. The method of claim 1 , further comprising:

using ultrasound sonography to guide positioning of the wirelessly powered passive device adjacent to or near the nerve at the target site.

13. The method of claim 1 , wherein causing the neural modulation comprises:

causing the input signal to be transmitted from the external antenna outside the patient's body, the input signal including electrical power and excitation pulses to drive the electrodes of the wirelessly powered passive device;

causing the input signal to be received non-inductively by one or more antennas on the wirelessly powered passive device;

causing the electrical power and excitation pulses to be extracted from the input signal; and

based on the electrical power, causing the excitation pulses to be delivered to the one or more electrodes on the wirelessly powered passive device.

14. The method of claim 1 , wherein placing a wirelessly powered passive device further comprises placing a wirelessly powered passive device that includes (i) electronic circuitry coupled to each of the one or more dipole antennas and configured to extract electric power and information encoding the one or more stimulation pulses from the input signal as received by the one or more dipole antennas.