Taylor Dawn M, Tillery Stephen I Helms, Schwartz Andrew B
Bioengineering Department, Arizona State University, Tempe, AZ 85287, USA.
IEEE Trans Neural Syst Rehabil Eng. 2003 Jun;11(2):195-9. doi: 10.1109/TNSRE.2003.814451.
Microwire electrode arrays were implanted in the motor and premotor cortical areas of rhesus macaques. The recorded activity was used to control the three-dimensional movements of a virtual cursor and of a robotic arm in real time. The goal was to move the cursor or robot to one of eight targets. Average information conveyed about the intended target was calculated from the observed trajectories at 30-ms intervals throughout the movements. Most of the information about intended target was conveyed within the first second of the movement. For the brain-controlled cursor, the instantaneous information transmission rate was at its maximum at the beginning of each movement (averaged 4.8 to 5.5 bits/s depending on the calculation method used). However, this instantaneous rate quickly slowed down as the movement progressed and additional information became redundant. Information was conveyed more slowly through the brain-controlled robot due to the dynamics and noise of the robot system. The brain-controlled cursor data was also used to demonstrate a method for optimizing information transmission rate in the case where repeated cursor movements are used to make long strings of sequential choices such as in a typing task.
将微丝电极阵列植入恒河猴的运动皮层和运动前皮层区域。记录的活动用于实时控制虚拟光标和机械臂的三维运动。目标是将光标或机器人移动到八个目标之一。在整个运动过程中，以30毫秒的间隔从观察到的轨迹计算关于预期目标的平均信息传递量。关于预期目标的大部分信息在运动的第一秒内传递。对于脑控光标，在每次运动开始时，瞬时信息传输速率达到最大值（根据所使用的计算方法，平均为4.8至5.5比特/秒）。然而，随着运动的进行，这种瞬时速率迅速减慢，额外的信息变得冗余。由于机器人系统的动力学和噪声，通过脑控机器人传递信息的速度较慢。脑控光标数据还用于演示一种在重复光标运动用于进行长串连续选择（如打字任务）的情况下优化信息传输速率的方法。
