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Related Experiment Video

Updated: Jun 4, 2026

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Published on: February 10, 2011

Dorsal column steerability with dual parallel leads using dedicated power sources: a computational model.

Dongchul Lee¹, Ewan Gillespie, Kerry Bradley

¹Boston Scientific, Neuromodulation.

Journal of Visualized Experiments : Jove

|February 23, 2011

Summary

A multi-source system for spinal cord stimulation (SCS) offers superior precision in steering electrical fields compared to single-source systems. This improved control enhances the ability to target pain regions, potentially optimizing therapeutic outcomes for patients.

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Area of Science:

Biomedical Engineering
Neuroscience
Medical Devices

Background:

Spinal cord stimulation (SCS) efficacy relies on matching stimulation-induced paresthesia to painful areas.
Dual parallel leads in the dorsal epidural space offer flexibility for mediolateral current steering.
Patient-specific pain patterns necessitate precise control over stimulation delivery.

Purpose of the Study:

To investigate the ability of dual parallel leads to steer stimulation using single-source versus multi-source systems.
To compare the precision and resolution of mediolateral steering between the two systems.
To evaluate the potential of advanced steering for optimizing pain-paresthesia overlap in SCS.

Main Methods:

Developed a finite element model of the low-thoracic spinal cord with dual parallel epidural leads.
Calculated the electric field and activating function for 10 µm fibers using ANSYS.
Computed the volume of activation (VOA) and its central point for single-source and multi-source systems.

Main Results:

The multi-source system demonstrated significantly greater targeting of central dorsal column points (100 vs. 3).
Mean mediolateral steering step was 50-fold finer with the multi-source system (0.02 mm vs. 1 mm).
Dedicated current sources per contact enabled high-resolution control over stimulation fields.

Conclusions:

Multi-source systems provide superior precision for steering SCS fields compared to single-source systems.
High-resolution centering of stimulation within the dorsal column is achievable with multi-source configurations.
This enhanced control may lead to improved optimization of paresthesia-pain overlap and SCS therapeutic efficacy.