Methods and systems for modulating neural tissue
Some embodiments of the present invention provide methods and systems for modulating neural tissue including systems and components for selective stimulation and/or neuromodulation of targeted neural tissue. Targeted neural tissue may include one or more ganglia including those of the spinal nerves in the dorsal root and the sympathetic chain. Methods also include implantation of an electrode on, in or around a dorsal root ganglia. Some other embodiments of the present invention provide methods for selective neurostimulation of one or more dorsal root ganglia as well as techniques for applying neurostimulation to the spinal cord. Still other embodiments of the present invention provide stimulation systems and components for selective stimulation and/or neuromodulation of one or more dorsal root ganglia through implantation of an electrode on, in or around a dorsal root ganglia in combination with a pharmacological agent.
1. A method of modulating nervous tissue within a dorsal root ganglion, comprising:
implanting an electrode within a dorsal root ganglion; and
providing electrical stimulation from the electrode to stimulate neural tissue within the dorsal root ganglion.
2. The method according to claim 1 wherein providing electrical stimulation comprises providing electrical stimulation that stimulates mostly A-fibers within the dorsal root ganglion.
3. The method according to claim 1 wherein implanting an electrode within a dorsal root ganglion comprises passing the tip of an electrode body completely through the dorsal root ganglion.
4. The method according to claim 1 wherein implanting an electrode comprises implanting an electrode adapted to stimulate only a single dorsal root ganglion.
5. The method according to claim 1 wherein implanting an electrode within a dorsal root ganglion comprises anchoring the tip of an electrode body after passing the tip of an electrode body completely through the dorsal root ganglion.
6. The method according to claim 1 wherein implanting an electrode within a dorsal root ganglion comprises securing a proximal end of an electrode body relative to the dorsal root ganglion.
7. A method of modulating a neural pathway in the sympathetic nervous system, comprising:
stimulating a spinal dorsal root ganglion upstream of at least one ganglion of the sympathetic nerve chain to influence a condition associated with the at least one ganglion of the sympathetic nerve chain, wherein the stimulating step is performed using an electrode within the dorsal root ganglion.
8. The method according to claim 7 further comprising applying stimulation to the at least one ganglion along the sympathetic nerve chain.
9. The method according to claim 8 wherein the applying stimulation step for the at least one ganglion along the sympathetic nerve chain is performed using an electrode exposed to the at least one ganglion along the sympathetic nerve chain.
10. The method according to claim 8 wherein the applying stimulation step for the at least one ganglion along the sympathetic nerve chain is performed using an electrode implanted within the at least one ganglion along the sympathetic nerve chain.
11. The method according to claim 7 wherein stimulating a spinal dorsal root ganglion comprises stimulating a spinal dorsal root ganglion upstream of at least one ganglion of the sympathetic nerve chain to influence functional activation of a bodily system associated with the at least one ganglion along the sympathetic nerve chain.
12. The method according to claim 7 wherein stimulating a spinal dorsal root ganglion comprises stimulating a spinal dorsal root ganglion upstream of at least one ganglion of the sympathetic nerve chain to influence functional activation of an organ associated with the at least one ganglion along the sympathetic nerve chain.
13. The method according to claim 7 wherein stimulating a spinal dorsal root ganglion comprises stimulating a spinal dorsal root ganglion upstream of at least one ganglion of the sympathetic nerve chain to influence functional inhibition of a bodily system associated with the at least one ganglion along the sympathetic nerve chain.
14. The method according to claim 7 wherein stimulating a spinal dorsal root ganglion comprises stimulating a spinal dorsal root ganglion upstream of at least one ganglion of the sympathetic nerve chain to influence functional inhibition of an organ associated with the at least one ganglion along the sympathetic nerve chain.
15. The method according to claim 7 wherein the at least one ganglion of the sympathetic nerve chain is a cervical ganglion.
16. The method according to claim 7 wherein the at least one ganglion of the sympathetic nerve chain is a thoracic ganglion.
17. The method according to claim 7 wherein the at least one ganglion of the sympathetic nerve chain is a lumbar ganglion.
18. The method according to claim 7 wherein the stimulating step is performed using an electrode exposed to the spinal dorsal root ganglion epinurium.