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Deep Brain Stimulation with Simultaneous fMRI in Rodents
Published on: February 15, 2014
Enhanced source localization accuracy through bidirectional deep brain stimulation (DBS) electrodes: a comparative
Babatunde Abdullahi Olatunji1, Narayan P Subramaniyam1, Eetu Siitama1,2
1Biomedical Technology Unit, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
Journal of Neural Engineering
|July 8, 2026
Summary
Integrating deep brain stimulation (DBS) electrodes with scalp electroencephalography (EEG) significantly enhances neural source localization accuracy for deep brain structures, especially in noisy conditions. This multimodal approach improves deep brain recordings by combining scalp coverage with high-SNR DBS data.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Signal Processing
Background:
- Accurate neural source localization from electroencephalography (EEG) is challenging for deep brain structures.
- Bidirectional deep brain stimulation (DBS) electrodes offer potential for improved neural recording.
Purpose of the Study:
- To investigate if integrating bidirectional DBS electrodes with scalp EEG improves deep brain source localization accuracy.
- To evaluate performance under varying signal-to-noise ratio (SNR) conditions.
Main Methods:
- Utilized three bidirectional DBS electrode configurations (4, 8, 40 contacts) with 72-channel scalp EEG.
- Employed finite element (FE) method-based forward modeling with an extended Complete Electrode Model (CEM) framework.
- Performed source reconstruction using standardized low-resolution electromagnetic tomography (sLORETA) and dipole scan across 30dB, 17.5dB, and 5dB SNR conditions.
Main Results:
- Integration of DBS and scalp EEG significantly improved source localization accuracy, particularly near the implanted lead.
- The 40-contact DBS configuration yielded the largest accuracy gains; the 8-contact configuration offered optimal balance.
- Dipole scan achieved near-perfect localization at 30dB SNR, while sLORETA showed stability across broader analyses.
Conclusions:
- Integrating scalp EEG with bidirectional DBS recordings is a promising strategy for deep brain source localization.
- This multimodal approach leverages complementary strengths of scalp and DBS electrodes across various conditions and algorithms.
- Potential applications include epilepsy monitoring, neuromodulation biomarker discovery, and seizure propagation studies in DBS patients.
