目录 /966 ■ Several cases Microwire arrays Motor cortex General description Neurochip Injury site. where natural commands die How does BCI work? Muscle control chip What signals can be Wheelchair control used in BCI Challenges Future Backpack computer Nicolelis,2001 2
2 Several cases General description How does BCI work? What signals can be used in BCI ? Challenges & Future 目 录
Challenges /96 Noise interference Internal and external noises (noisy environment) Inter-/intra-subject variation Asynchronous operation Limited number of coded tasks. 3
3 Challenges Noise interference Internal and external noises (noisy environment) Inter-/intra-subject variation Asynchronous operation Limited number of coded tasks
不同的接口类型所获得的信号强度有很大差异 /986 Brain-penetrating microelectrodes LFP <1mV <200Hz Brain-surface electrodes SPIKES 5-500μV 0.1-7kHz EEG sensor 州 5-300μV EEG <100Hz ECoG 0.01-5mV <200Hz 4
4 不同的接口类型所获得的信号强度有很大差异
Challenge for asynchronous operation /966 MI PMd 96 Channels sample Rest Reach Hold Release Withdraw Grasp Rest (Visual cue) Event Light ON Light OFF Water Reward 手柄 平板 圆柱 圆环 (Y.Hao,et al,2012,CSB,Y.Hao,et al,2014,JNE 5 (浙江大学陈卫东提供)
5 M1 PMd 96 Channels sample Rest Reach Grasp Hold Release Withdraw Rest Event Light ON Light OFF Water Reward (Visual cue) (Y. Hao, et al, 2012, CSB, Y. Hao, et al, 2014, JNE ) （浙江大学陈卫东提供） Challenge for asynchronous operation
Challenge for SSVEP based BCI /966 4cm 3cm WATCH YO 8 2 3 回 The number of available stimulus frequencies is very limited !! 6
6 Challenge for SSVEP based BCI The number of available stimulus frequencies is very limited !!!