Multi-Electrode Implantable Device for Deep Brain Stimulation

The patent divides a single electrode into multiple segmented electrodes arranged in a three-dimensional configuration. Each segment can be independently controlled to deliver electrical stimulation to specific targeted areas within the brain, allowing precise stimulation without requiring high amplitudes that would damage tissue. The segmentation enables the stimulation field to be distributed across multiple smaller targets rather than concentrating energy in one location.

The patent transitions from a traditional single-point electrode to a multi-electrode array distributed in three-dimensional space. This dimensional expansion allows the device to target multiple locations simultaneously and creates a more flexible stimulation geometry that can reach areas outside the conventional cylindrical zone without increasing signal amplitude, thereby avoiding tissue damage.

The electrode is divided into multiple independent segments that can be individually activated or deactivated. This segmentation provides programmable flexibility in defining stimulation volumes and shapes, allowing the device to adapt to different clinical requirements while maintaining a relatively simple physical structure that can be implanted through standard procedures.

The multi-electrode array is designed to perform multiple functions: it can stimulate different brain regions, create various stimulation volume shapes, and target areas at different distances from the implant site. This universal capability replaces what would traditionally require multiple different electrode designs or implantation approaches, consolidating versatility into a single device platform.

The patent employs a nested structure where multiple electrode segments are integrated within a compact assembly that can be delivered through a single implantation site. The electrodes are arranged in a folded or nested configuration that minimizes the implant footprint while maintaining their three-dimensional spatial distribution, allowing precise targeting without proportionally increasing overall device complexity.

The electrode segments are arranged in a curved or spherical geometry rather than linear configurations. This curved arrangement allows the electrodes to occupy three-dimensional space efficiently within a compact volume, enabling precise spatial distribution of stimulation points while keeping the overall device structure manageable and suitable for implantation.