从人类执行 NBack 任务时的皮层电场电位绘制认知活动图。

IF 1.3 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Renee Johnston,Chadwick Boulay,Kai Miller,Adam Sachs
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引用次数: 0

摘要

目的:数据科学和辅助技术的进步使侵入式脑机接口(iBCIs)在提高肢体残疾人生活质量方面变得越来越可行。皮质内微型电极植入物因其精细的时间和空间分辨率而成为此类通信系统的常见选择。这些植入物体积小,因此植入计划对于信息的成功渗入至关重要,尤其是在针对缺乏强大解剖相关性的任务目标表征时。方法工作记忆过程包括编码、检索和维持,在大脑的许多区域都能观察到。利用工作记忆实验过程中的人体皮层电图记录,我们证明有可能定位与任务相关的认知活动,并确定与执行记忆功能相关的关键位置。通过分析,我们提出了具有所需特征的最佳 iBCI 植入位置。这种通用方法并不局限于工作记忆,还可用于绘制其他目标编码因素的地图,如运动意图、决策和视觉空间注意力。在参与者参与定制的认知任务时检查心电电极的局部场电位,可以精确定位与预期行动相关的有价值信息。本手稿证明了在用户参与 NBack 任务期间识别参与工作记忆相关认知活动的电极的可行性。花时间精心准备以确定 BCI 植入位置的最佳脑区将增加获得丰富信号结果的可能性,从而改善 BCI 用户的整体体验。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mapping cognitive activity from electrocorticography field potentials in humans performing NBack task.
OBJECTIVE Advancements in data science and assistive technologies have made invasive brain-computer interfaces (iBCIs) increasingly viable for enhancing the quality of life in physically disabled individuals. Intracortical micro-electrode implants are a common choice for such a communication system due to their fine temporal and spatial resolution. The small size of these implants makes the implantation plan critical for the successful exfiltration of information, particularly when targeting representations of task goals that lack robust anatomical correlates. APPROACH Working memory processes including encoding, retrieval, and maintenance are observed in many areas of the brain. Using human electrocorticography recordings during a working memory experiment, we provide proof that it is possible to localize cognitive activity associated with the task and to identify key locations involved with executive memory functions. Results. From the analysis, we could propose an optimal iBCI implant location with the desired features. The general approach is not limited to working memory but could also be used to map other goal-encoding factors such as movement intentions, decision-making, and visual-spatial attention. SIGNIFICANCE Deciphering the intended action of a BCI user is a complex challenge that involves the extraction and integration of cognitive factors such as movement planning, working memory, visual spatial attention, and the decision state. Examining local field potentials from ECoG electrodes while participants engaged in tailored cognitive tasks can pinpoint location with valuable information related to anticipated actions. This manuscript demonstrates the feasibility of identifying electrodes involved in cognitive activity related to working memory during user engagement in the NBack task. Devoting time in meticulous preparation to identify the optimal brain regions for BCI implant locations will increase the likelihood of rich signal outcomes, thereby improving the overall BCI user experience. .
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来源期刊
Biomedical Physics & Engineering Express
Biomedical Physics & Engineering Express RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
2.80
自引率
0.00%
发文量
153
期刊介绍: BPEX is an inclusive, international, multidisciplinary journal devoted to publishing new research on any application of physics and/or engineering in medicine and/or biology. Characterized by a broad geographical coverage and a fast-track peer-review process, relevant topics include all aspects of biophysics, medical physics and biomedical engineering. Papers that are almost entirely clinical or biological in their focus are not suitable. The journal has an emphasis on publishing interdisciplinary work and bringing research fields together, encompassing experimental, theoretical and computational work.
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