Closed-loop stimulation of a delayed neural fields model of parkinsonian STN-GPe network: a theoretical and computational study

Abstract : Several disorders are related to pathological brain oscillations. In the case of Parkinson's disease, sustained low-frequency oscillations (especially in the β-band, 13–30 Hz) correlate with motor symptoms. It is still under debate whether these oscillations are the cause of parkinsonian motor symptoms. The development of techniques enabling selective disruption of these β-oscillations could contribute to the understanding of the underlying mechanisms, and could be exploited for treatments. A particularly appealing technique is Deep Brain Stimulation (DBS). With clinical electrical DBS, electrical currents are delivered at high frequency to a region made of potentially heterogeneous neurons (the subthalamic nucleus (STN) in the case of Parkinson's disease). Even more appealing is DBS with optogenetics, which is until now a preclinical method using both gene transfer and deep brain light delivery and enabling neuromodulation at the scale of one given neural network. In this work, we rely on delayed neural fields models of STN and the external Globus Pallidus (GPe) to develop, theoretically validate and test in silico a closed-loop stimulation strategy to disrupt these sustained oscillations with optogenetics. First, we rely on tools from control theory to provide theoretical conditions under which sustained oscillations can be attenuated by a closed-loop stimulation proportional to the measured activity of STN. Second, based on this theoretical framework, we show numerically that the proposed closed-loop stimulation efficiently attenuates sustained oscillations, even in the case when the photosensitization effectively affects only 50% of STN neurons. We also show through simulations that oscillations disruption can be achieved when the same light source is used for the whole STN population. We finally test the robustness of the proposed strategy to possible acquisition and processing delays, as well as parameters uncertainty.
Complete list of metadatas

Cited literature [77 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01251739
Contributor : Antoine Chaillet <>
Submitted on : Wednesday, January 6, 2016 - 9:28:12 PM
Last modification on : Tuesday, February 26, 2019 - 10:12:32 AM
Long-term archiving on : Thursday, April 7, 2016 - 4:09:08 PM

File

150901 - Frontiers neural fiel...
Publication funded by an institution

Identifiers

Citation

Georgios Detorakis, Antoine Chaillet, Stéphane Palfi, Suhan Senova. Closed-loop stimulation of a delayed neural fields model of parkinsonian STN-GPe network: a theoretical and computational study. Frontiers in Neuroscience, Frontiers, 2015, 9 (237), ⟨10.3389/fnins.2015.00237⟩. ⟨hal-01251739⟩

Share

Metrics

Record views

510

Files downloads

216