Neurotransmitter stimulation of neurons with feedback from sensors

• US 20070016151A1
• Filed: 07/13/2006
• Published: 01/18/2007
• Est. Priority Date: 07/15/2005
• Status: Abandoned Application

• Current Assignee: IMEC International
• Original Assignee: Interuniversitair Micro-Electronica Centrum VZW (IMEC International)
• Inventors: Bartic, Carmen, Mernier, Guillaume
• Application Number:
  US11/485,742
• Publication Number:
  US 20070016151A1
• Time in Patent Office: Days
• US Class Current: 604/288.40
• CPC Class Codes: A61M 2205/0244 Micromachined materials, e.g. made from silicon wafers, microelectromechanical systems [MEMS] or comprising nanotechnology
• CPC Class Codes: A61M 2210/0693 Brain, cerebrum
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G06N 3/061 using biological neurons, e.g. biological neurons connected to an integrated circuit

Abstract

The present invention provides a system for the release of neurotransmitters and a method for the manufacturing of such a system. The system according to the present invention allows for local release of neurotransmitters and therefore makes it possible to activate single neurons. Furthermore, the system according to the invention is efficient, reproducible, and has a low power supply.

Claims

1. A system for performing neurotransmitter stimulation of neurons, comprising:

an actuated system for the chemical stimulation of neurons comprising at least one synthetic reservoir having at least one aperture and an actuation means for controlling a release of neurotransmitter molecules through the at least one aperture of the at least one synthetic reservoir, wherein the reservoir comprises neurotransmitter molecules; and

a feedback system comprising at least one sensor, wherein the actuation means is controlled by the feedback system.

2. A system according to claim 1, wherein the actuation means is an electrically-driven actuation means.

3. A system according to claim 1, wherein the actuation means comprises at least a first electrode and a second electrode.

4. A system according to claim 3, wherein the at least one synthetic reservoir is formed in a substrate, wherein the first electrode is positioned at a bottom surface of the substrate and the second electrode is positioned at a top surface of the substrate.

5. A system according to claim 1, wherein the actuation means is a pressure-based actuation means.

6. A system according to claim 5, wherein the actuation means comprises a membrane.

7. A system according to claim 6, wherein the membrane is formed of an electrically actuatable layer sandwiched between two electrodes.

8. A system according to claim 7, wherein the electrically actuatable layer is a piezoelectric layer.

9. A system according to claim 5, the system comprising a first substrate and a second substrate, wherein the actuation means is positioned in between the first substrate and the second substrate.

10. A system according to claim 1, wherein the at least one synthetic reservoir is an array of synthetic reservoirs, wherein each of the synthetic reservoirs has an aperture.

11. A system according to claim 1, wherein the at least one synthetic reservoir has more than one aperture.

12. A method for the manufacturing a system for performing neurotransmitter stimulation of neurons, comprising:

providing at least one synthetic reservoir for containing neurotransmitter molecules, wherein the at least one synthetic reservoir has at least one aperture;

providing an actuation means for controlling a release of the neurotransmitter molecules through the at least one aperture of the at least one synthetic reservoir; and

providing a feedback means for controlling the actuation means.

13. A method according to claim 12, wherein the feedback means comprises at least one sensor.

14. A method according to claim 12, wherein providing at least one synthetic reservoir comprises etching a substrate from a first surface toward a second surface of the substrate.

15. A method according to claim 12, wherein the actuation means is an electrically-driven actuation means.

16. A method according to claim 15, wherein the actuation means comprises a first electrode on a first surface of the substrate and a second electrode on a second surface of the substrate.

17. A method according to claim 12, wherein the actuation means comprises a pressure-based actuation means.

18. A method according to claim 17, wherein the actuation means comprises an electrically actuatable membrane.

19. A method according to claim 18, wherein the electrically actuatable membrane comprises a film sandwiched in between two electrodes.

20. A method according to claim 19, wherein the film comprises a piezoelectric film.

21. In a system for performing neurotransmitter stimulation of neurons comprising an actuated system for the chemical stimulation of neurons comprising at least one synthetic reservoir having at least one aperture and an actuation means for controlling a release of neurotransmitter molecules through the at least one aperture of the at least one synthetic reservoir, wherein the reservoir comprises neurotransmitter molecules, and a feedback system comprising at least one sensor, wherein the actuation means is controlled by the feedback system, a method for determining a control signal for controlling the actuation means, comprising:

detecting neuron activity in the form of neuronal signals;

comparing the neuronal signals with a pre-determined threshold voltage; and

from this comparison, determining the control signal for the actuation means.

22. In a system for performing neurotransmitter stimulation of neurons comprising an actuated system for the chemical stimulation of neurons comprising at least one synthetic reservoir having at least one aperture and an actuation means for controlling a release of neurotransmitter molecules through the at least one aperture of the at least one synthetic reservoir, wherein the reservoir comprises neurotransmitter molecules, and a feedback system comprising at least one sensor, wherein the actuation means is controlled by the feedback system, a system for determining a control signal for controlling the actuation means, comprising:

a processor;

data storage; and

machine language instructions stored in the data storage executable by the processor to;

detect neuron activity in the form of neuronal signals;

compare the neuronal signals with a predetermined threshold voltage; and

from this comparison, determine the control signal for the actuation means.