fig10

Figure 10. Surgically embedded SSIs. (A) Comparison of invasive BCI techniques. The brain anatomy in the middle part of (A): Adapted from Ref. [176], under CC BY 4.0 license. Signals in the right part of (A): Adapted from Ref. [177], under CC BY 4.0 license; (B) ECoG systems for SSIs. Adapted from Ref. [178], under CC BY 4.0 license; (C) MEA systems for SSIs. The surgically embedded devices and positions of (C): Adapted from Ref. [38], under CC BY 4.0 license. SSIs: Silent speech interfaces; BCI: brain-computer interface; ECoG: electrocorticography; MEA: microelectrode array; SEEG: stereo-electroencephalography; LFP: local field potential.