Local field potential (LFP)
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脑机芯片,新突破
半导体芯闻· 2025-03-07 10:20
Core Viewpoint - The article discusses advancements in brain-computer interface (BCI) technology, specifically the development of a new type of implantable chip that utilizes larger groups of neurons and consumes less power, potentially allowing users greater autonomy in initiating movement control [1][5]. Group 1: Technology Development - Researchers have designed an intracortical brain-computer interface (iBCI) that can detect when users intend to perform specific actions, such as reaching for an object [1]. - The new chip monitors the local field potentials (LFP) of groups of neurons rather than individual neurons, which simplifies the process and reduces power consumption [2][4]. - The LFP method activates the chip only when specific neural activity thresholds are reached, allowing for passive monitoring of brain activity [4]. Group 2: Energy Efficiency - The study published in the IEEE Biomedical Circuits and Systems Journal indicates that the LFP method requires significantly less energy compared to traditional methods while maintaining comparable performance in determining user intent [4][6]. - The LFP-based brain chip's simpler recording circuitry reduces hardware complexity and minimizes the risk of brain tissue scarring, potentially extending the device's lifespan [4][6]. Group 3: User Autonomy - The new system aims to enable users to perform tasks more independently without the need for manual activation of their brain chips [5][6]. - Researchers are working on integrating the LFP method with broader iBCI systems that also utilize data from individual neuron discharges for more precise motor control [6].