Multifocal Brain Stimulation for Cognitive Network Modulation
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Solution Overview
Problem
Current brain stimulation techniques have limited effectiveness in enhancing cognitive processes such as memory and language production, particularly for conditions like dementia and epilepsy, due to their focal approach rather than network-based stimulation.
Innovation Solution
A method and system for multifocal direct brain stimulation that applies intracranial electrical stimulation to multiple nodes in different brain regions, synchronized at specific frequency bands to induce coherent oscillations, using subdural or depth electrodes, and monitored through imaging and recording procedures to mimic endogenous neural activity patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If focal brain stimulation is applied to a single brain region, then the stimulation device complexity is reduced, but the effectiveness in enhancing cognitive processes deteriorates
Solution Approach 1:
The invention divides the brain into multiple discrete nodes (e.g., hippocampus, prefrontal cortex, parietal cortex) that are stimulated independently through separate electrodes. This segmentation allows the system to target specific functional regions involved in cognitive processes while maintaining manageable device complexity through modular electrode placement and independent stimulation channels.
Solution Approach 2:
The invention combines multiple focal stimulation sites into a coordinated network-based stimulation system. By synchronizing electrical stimulation across multiple brain nodes at specific frequency bands (theta, alpha, beta, gamma), the system creates coherent oscillations that enhance cognitive processes more effectively than single-site stimulation, while integrating these multiple sites into a unified control system.
2Reliability
If network-based multifocal stimulation is applied to multiple brain regions, then the effectiveness in enhancing cognitive processes is improved, but the device complexity increases
Solution Approach 1:
The stimulation system is designed with multi-functionality to address various cognitive processes (memory, attention, language) by targeting different network configurations of brain nodes. The same basic stimulation apparatus can be adapted to stimulate different combinations of brain regions depending on the specific cognitive function being enhanced, reducing the need for multiple specialized devices.
Solution Approach 2:
The system manages complexity by allowing dynamic adjustment of stimulation parameters (frequency bands, amplitude, pulse width, inter-site timing) rather than requiring complex hardware changes. This enables flexible optimization of stimulation efficacy for different cognitive processes and individual patients through parameter tuning rather than device redesign.
3Reliability
If phase-synchronized electrical stimulation is applied at specific frequency bands, then coherent oscillations are induced to enhance cognitive processes, but the precision of stimulation timing requirements increases
Solution Approach 1:
The invention employs periodic electrical stimulation delivered in rhythmic bursts at specific frequency bands (theta: 4-8 Hz, alpha: 8-12 Hz, beta: 13-30 Hz, gamma: 30-100 Hz). This periodic delivery pattern facilitates the induction of coherent oscillations across brain nodes while providing a structured timing framework that simplifies synchronization requirements compared to continuous or aperiodic stimulation.
Solution Approach 2:
The system incorporates monitoring of brain electrical activity (via EEG or intracranial electrodes) to provide feedback on the actual oscillatory responses. This feedback allows real-time adjustment of stimulation timing and phase to optimize coherent oscillation induction, compensating for natural variations in brain state and reducing the stringency of fixed timing precision requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances cognitive processes by improving memory recall, reducing memory loss, and modulating brain networks, potentially offering more effective treatment for conditions like dementia and epilepsy by targeting distributed brain networks rather than isolated areas.
Implementation Method 1
applying an intracranial electrical stimulation to a plurality of nodes in different regions of the brain
Implementation Method 2
applying the intracranial electrical simulation is phase-synchronized at a first frequency band
Implementation Method 3
applying the intracranial electrical electrical simulation to the plurality of nodes in different regions of the brain of the subject induces coherent oscillations between the nodes
Data Source
AI summary
This invention relates generally to systems and methods for multifocal direct brain stimulation to enhance cognitive processing, such as but not limited to stimulation-induced modulation of memory.