Pulsed Electromagnetic Field Brain Stimulation for Depression
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Solution Overview
Problem
Current methods for treating mental disorders, such as depression, using transcranial magnetic stimulation (TMS) often result in side effects like pain, speech arrest, and limited biological activity due to strong magnetic fields, which can be harmful and ineffective for patients with certain conditions.
Innovation Solution
A method and apparatus utilizing pulsed electromagnetic fields (PEMF) with weaker magnetic fields, specifically designed to stimulate brain tissue without eliciting action potentials, using a series of bipolar square voltage pulses and strategically arranged coils to induce electrical fields that activate protein kinases and enhance cellular activity, particularly in the hippocampus and cortex.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong magnetic fields are used for transcranial magnetic stimulation (TMS), then neural tissue can be stimulated, but side effects like pain, speech arrest, and limited biological activity occur
Solution Approach 1:
The patent changes the parameters of the magnetic field from strong, static fields to weak, pulsed fields with specific frequency characteristics. The magnetic field strength is reduced to below the threshold for action potential elicitation, while pulse frequency and duration are optimized to achieve neural stimulation through different mechanisms, thereby eliminating side effects while maintaining therapeutic effectiveness
Solution Approach 2:
The patent employs periodic pulsed magnetic fields instead of continuous strong fields. The magnetic field is applied in repeated pulses at specific frequencies (e.g., 50-100 Hz), which enables neural tissue stimulation through resonant effects and cumulative biological activity without the harmful effects associated with continuous strong field exposure
2Reliability
If strong magnetic fields are used for TMS, then neural stimulation is achieved, but biological activity is limited and harmful effects increase
Solution Approach 1:
The patent transforms the magnetic field parameters from high strength to low strength, changing the mechanism of action from direct action potential elicitation to indirect cellular signaling activation. This parameter change enables enhanced biological activity through protein kinase activation and cellular signaling pathways while eliminating the harmful effects of strong field exposure
Solution Approach 2:
The patent converts the limitation of weak field strength (which normally would reduce stimulation effectiveness) into a benefit by using pulsed delivery and frequency optimization to achieve enhanced biological activity. The weak fields avoid harmful effects while the pulsed pattern accumulates therapeutic effects through repeated cellular signaling activation
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
The PEMF treatment effectively stimulates neural tissue, enhancing cellular activity, angiogenesis, and blood flow, leading to improved conditions for depression and bipolar disorders, as demonstrated in a double-blind placebo-controlled study, with fewer side effects and greater patient safety compared to traditional TMS methods.
Implementation Method 1
The passage of electrical current induces a strong (2 Tesla) magnetic field which induces electrical currents in nearby tissues
Implementation Method 2
The passage of electrical current induces a strong (2 Tesla) magnetic field which induces electrical currents in nearby tissues
Data Source
AI summary
The present invention concerns an apparatus and a method for stimulating brain tissue with pulsed electromagnetic fields weaker than the limit for elicitation of the action potentials of the cells of the tissue to be stimulated, the apparatus comprising: at least one electrically conducting coil positioned at a bitemporal position such that hippocampus is stimulated by at least one magnetic field upon supplying a pulse to said coil as well as a coil positioned at a occipital and parietal position; and a pulse generation means operationally connected to said at least one coil for supplying a series of current pulses for conduction, allowing generation of pulsed electromagnetic fields sufficiently strong to cause protein activation, and weaker than the limit for elicitation of the action potentials of the cells of the tissue to be stimulated.