Closed-loop controller based on reference signal tracking for absence seizures
Abstract Absent epilepsy is a kind of refractory epilepsy, which is characterized by 2–4 Hz spike and wave discharges (SWDs) in electroencephalogram. Open-loop deep brain stimulation (DBS) targeting the thalamic reticular nucleus (TRN) is an effective method to treat absent epilepsy by eliminating S...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10803-x |
| _version_ | 1828370223909044224 |
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| author | Hudong Zhang Yuting Chen Yan Xie Yuan Chai |
| author_facet | Hudong Zhang Yuting Chen Yan Xie Yuan Chai |
| author_sort | Hudong Zhang |
| collection | DOAJ |
| description | Abstract Absent epilepsy is a kind of refractory epilepsy, which is characterized by 2–4 Hz spike and wave discharges (SWDs) in electroencephalogram. Open-loop deep brain stimulation (DBS) targeting the thalamic reticular nucleus (TRN) is an effective method to treat absent epilepsy by eliminating SWDs in the brain. Compared with open-loop DBS, closed-loop DBS has been recognized by researchers for its advantages of significantly inhibiting seizures and having fewer side effects. Since traditional trial-and-error methods for adjusting closed-loop controller parameters are too dependent on the experience of doctors, in this paper we designed two proportional integral (PI) controllers based on the basal ganglia-cortical-thalamic model, whose PI parameters are calculated from the stability of the system. The two PI controllers can automatically adjust the frequency and amplitude of DBS respectively according to the change of the firing rate detected by substantia nigra pars reticulata (SNr). The parameters of the PI controller are calculated based on the Routh-Hurwitz stability criterion of a linear system which transformed by the original system using controlled auto-regressive (CAR) model and recursive least squares (RLS) method. Numerical simulation results show that both PI controllers significantly destroy the SWDs of the cerebral cortex and restore it to the other two normal discharge modes according to the different target firing rate, which supplies a promising brain stimulation strategy. |
| first_indexed | 2024-04-14T06:35:15Z |
| format | Article |
| id | doaj.art-1f0bb2e7e03944acbb1325c652692f82 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-14T06:35:15Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1f0bb2e7e03944acbb1325c652692f822022-12-22T02:07:29ZengNature PortfolioScientific Reports2045-23222022-04-0112111510.1038/s41598-022-10803-xClosed-loop controller based on reference signal tracking for absence seizuresHudong Zhang0Yuting Chen1Yan Xie2Yuan Chai3School of Mathematics and Physics, Shanghai University of Electric PowerSchool of Mathematics and Physics, Shanghai University of Electric PowerSchool of Mathematics and Physics, Shanghai University of Electric PowerSchool of Mathematics and Physics, Shanghai University of Electric PowerAbstract Absent epilepsy is a kind of refractory epilepsy, which is characterized by 2–4 Hz spike and wave discharges (SWDs) in electroencephalogram. Open-loop deep brain stimulation (DBS) targeting the thalamic reticular nucleus (TRN) is an effective method to treat absent epilepsy by eliminating SWDs in the brain. Compared with open-loop DBS, closed-loop DBS has been recognized by researchers for its advantages of significantly inhibiting seizures and having fewer side effects. Since traditional trial-and-error methods for adjusting closed-loop controller parameters are too dependent on the experience of doctors, in this paper we designed two proportional integral (PI) controllers based on the basal ganglia-cortical-thalamic model, whose PI parameters are calculated from the stability of the system. The two PI controllers can automatically adjust the frequency and amplitude of DBS respectively according to the change of the firing rate detected by substantia nigra pars reticulata (SNr). The parameters of the PI controller are calculated based on the Routh-Hurwitz stability criterion of a linear system which transformed by the original system using controlled auto-regressive (CAR) model and recursive least squares (RLS) method. Numerical simulation results show that both PI controllers significantly destroy the SWDs of the cerebral cortex and restore it to the other two normal discharge modes according to the different target firing rate, which supplies a promising brain stimulation strategy.https://doi.org/10.1038/s41598-022-10803-x |
| spellingShingle | Hudong Zhang Yuting Chen Yan Xie Yuan Chai Closed-loop controller based on reference signal tracking for absence seizures Scientific Reports |
| title | Closed-loop controller based on reference signal tracking for absence seizures |
| title_full | Closed-loop controller based on reference signal tracking for absence seizures |
| title_fullStr | Closed-loop controller based on reference signal tracking for absence seizures |
| title_full_unstemmed | Closed-loop controller based on reference signal tracking for absence seizures |
| title_short | Closed-loop controller based on reference signal tracking for absence seizures |
| title_sort | closed loop controller based on reference signal tracking for absence seizures |
| url | https://doi.org/10.1038/s41598-022-10803-x |
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