WO2001078833A1 - Method, device and system for inducing changes in the excitability of the brain of a living organism - Google Patents
Method, device and system for inducing changes in the excitability of the brain of a living organism Download PDFInfo
- Publication number
- WO2001078833A1 WO2001078833A1 PCT/DE2001/001477 DE0101477W WO0178833A1 WO 2001078833 A1 WO2001078833 A1 WO 2001078833A1 DE 0101477 W DE0101477 W DE 0101477W WO 0178833 A1 WO0178833 A1 WO 0178833A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brain
- excitability
- current
- stimulation
- changes
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/20—Applying electric currents by contact electrodes continuous direct currents
- A61N1/205—Applying electric currents by contact electrodes continuous direct currents for promoting a biological process
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36014—External stimulators, e.g. with patch electrodes
- A61N1/36025—External stimulators, e.g. with patch electrodes for treating a mental or cerebral condition
Definitions
- the invention relates to a method for inducing excitability changes in the brain of a living being according to the preamble of claim 1, a device for inducing excitability changes in the brain of a living being according to the preamble of claim 12 and a system for inducing excitability changes in the brain of a living being the preamble of claim 20.
- the change in excitability is due to a shift in the resting membrane potential of the nerve cells. This is usually around -70 mV. By increasing the resting membrane potential, the excitability is inhibited, and by reducing the potential, the excitability is increased.
- the object of the invention is to achieve changes in excitability which last beyond the duration of the stimulation.
- a direct current of a current intensity which neither has a permanently damaging influence on the tissue nor is perceived by the living being as a nuisance is applied over a sufficiently long period of time, whereupon the neuroplasticity effect occurs.
- a permanent neuronal change, here a change in excitability, is generally referred to as neuroplasticity.
- brain functions can be influenced in psychological approaches and behavioral examinations can be carried out by switching off or activating selected brain regions.
- Another application is the development and testing of the effectiveness of new drugs.
- Treatable disorders such. B. epilepsy, stroke or movement disorders.
- electrical stimuli enables local application and thus avoids side effects such as medicinal products. show in most cases, which are supplied via the living being's vascular system.
- electrical stimuli does not require any or only minor and infrequent interventions in the body of the living being.
- the current strength is preferably between 0.01 A and 4 mA and the duration> 1 min.
- Continuous stimulation is also possible at currents below 0.2 mA.
- the design information was determined by means of series of tests in which a neuroplasticity effect occurred. In practice, ranges are preferred which are between 0.1 mA and 3 mA current strength and a time period of> 3 min and, for current strengths below 0.2 mA, also a time period of >> 3 min.
- DC stimulation can be done inside the brain, under the skull, under the scalp, or outside the scalp. Depending on the type of delivery, there is a more global or more local influence on the brain regions.
- the stimulation can be performed locally on one brain region or on several brain regions, the excitability of which is should be dampened or increased.
- this can be the brain region that was identified in a previous examination as the origin of a disorder to be treated.
- a locally very limited stimulation is then possible, which is highly effective for the target region, but leaves neighboring regions largely unaffected and protects.
- a medicament before the stimulation, can be administered which comprises at least one substance which attacks the central nervous system and which suppresses an exciting or inhibiting part of the changes in excitability.
- These drugs can also be administered in tablet form by injection.
- This additional measure can be used to improve a targeted change in excitability.
- An ion channel blocker has proven to be suitable as a substance for suppressing an exciting portion of the excitability changes.
- the sodium ion channel blocker carbamazepine can be used for this.
- the stimulation to block an epileptic seizure can be carried out and controlled depending on the result of a prognosis of an upcoming seizure.
- the stimulation can inhibit the excitability of regional brain regions in which seizure-like conditions as a result of synchronized neuronal discharges originate in cortical cerebral structures.
- the advantage of direct current stimulation is that it has an immediate effect by shifting the resting membrane potential of the brain cells involved, which continues for a while even after the stimulation has been switched off.
- the forecast of an impending seizure is preferably carried out by evaluating brain current curves. This is because there is an increase in the correlation of the brain flow curves measured in different regions as a harbinger of an epileptic seizure, which gives an evaluation criterion.
- the drawing shows a schematic diagram of a device according to the invention.
- This includes a controllable current source 10 with electrodes 12, 14, 16 and a control device 18.
- the electrodes 12, 14, 16 are attached to the head 20 of a person on the scalp.
- a common base electrode 12 is located above an eye, and two electrodes 14, 16 serving as cathodes are located above the brain lobe.
- controllable current source 10 When controlled, the controllable current source 10 supplies a direct current which can be varied between 0.5 mA and 3 mA.
- the duration of the application of preferably> 3 min and the selected amount of current is determined by the control device 18.
- the excitability of the relevant areas of the brain is reduced. This effect can be used to counter an impending epilepsy attack.
- the device can be supplemented by an evaluation device 22 for brain current curves. If a criterion as a harbinger of an epileptic seizure occurs, the control device 18 can then be specifically directed to emit corresponding signals to the controllable current source 10, while no stimulation is required in another seizure-free period.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01935978A EP1185333A1 (en) | 2000-04-13 | 2001-04-17 | Method, device and system for inducing changes in the excitability of the brain of a living organism |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10018518.5 | 2000-04-13 | ||
DE2000118518 DE10018518A1 (en) | 2000-04-13 | 2000-04-13 | Method of inducing changes in stimulation of the brain of a living being |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001078833A1 true WO2001078833A1 (en) | 2001-10-25 |
Family
ID=7638738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/001477 WO2001078833A1 (en) | 2000-04-13 | 2001-04-17 | Method, device and system for inducing changes in the excitability of the brain of a living organism |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1185333A1 (en) |
DE (1) | DE10018518A1 (en) |
WO (1) | WO2001078833A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005092183A1 (en) * | 2004-03-12 | 2005-10-06 | Cyberkinetics, Inc. | Neurological event monitoring and therapy systems and related methods |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4503863A (en) * | 1979-06-29 | 1985-03-12 | Katims Jefferson J | Method and apparatus for transcutaneous electrical stimulation |
WO1994000188A1 (en) * | 1992-06-24 | 1994-01-06 | Cyberonics, Inc. | Treatment of neuropsychiatric disorders by nerve stimulation |
US5332401A (en) * | 1989-11-01 | 1994-07-26 | Capel Ifor Donald | Apparatus and method for transcranial electrotheraphy |
US5800459A (en) * | 1996-12-24 | 1998-09-01 | The United States Of America As Represented By The Secretary Of The Navy | Electric field control of epiletiform activity |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5713922A (en) * | 1996-04-25 | 1998-02-03 | Medtronic, Inc. | Techniques for adjusting the locus of excitation of neural tissue in the spinal cord or brain |
US5683422A (en) * | 1996-04-25 | 1997-11-04 | Medtronic, Inc. | Method and apparatus for treating neurodegenerative disorders by electrical brain stimulation |
US5752979A (en) * | 1996-11-01 | 1998-05-19 | Medtronic, Inc. | Method of controlling epilepsy by brain stimulation |
US6016449A (en) * | 1997-10-27 | 2000-01-18 | Neuropace, Inc. | System for treatment of neurological disorders |
-
2000
- 2000-04-13 DE DE2000118518 patent/DE10018518A1/en not_active Ceased
-
2001
- 2001-04-17 EP EP01935978A patent/EP1185333A1/en not_active Ceased
- 2001-04-17 WO PCT/DE2001/001477 patent/WO2001078833A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4503863A (en) * | 1979-06-29 | 1985-03-12 | Katims Jefferson J | Method and apparatus for transcutaneous electrical stimulation |
US5332401A (en) * | 1989-11-01 | 1994-07-26 | Capel Ifor Donald | Apparatus and method for transcranial electrotheraphy |
WO1994000188A1 (en) * | 1992-06-24 | 1994-01-06 | Cyberonics, Inc. | Treatment of neuropsychiatric disorders by nerve stimulation |
US5800459A (en) * | 1996-12-24 | 1998-09-01 | The United States Of America As Represented By The Secretary Of The Navy | Electric field control of epiletiform activity |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005092183A1 (en) * | 2004-03-12 | 2005-10-06 | Cyberkinetics, Inc. | Neurological event monitoring and therapy systems and related methods |
Also Published As
Publication number | Publication date |
---|---|
EP1185333A1 (en) | 2002-03-13 |
DE10018518A1 (en) | 2001-10-25 |
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