Hybrid brain–computer interface for biomedical cyber-physical system application using wireless embedded EEG systems

Table 6 Results of accuracy of patients with tetraplegia (SCI1-SCI5) with chosen task combinations for hybrid BCI algorithm

Task combination	SCI1–SCI5 = five patients with tetraplegia A1–A5 = accuracies (%); B1–B5 = bit rates (bit/min)
	SCI1		SCI2		SCI3		SCI4		SCI5		Mean accuracy %	Mean bit rate bit/min
	A1	B1	A2	B2	A3	B3	A4	B4	A5	B5	Mean accuracy %	Mean bit rate bit/min
Baseline and eyes closed	96	45	95	44	87	26	88	29	98	51	93	39
Arithmetic, rotation and letter	74	30	64	17	67	20	68	22	70	24	69	22
Arithmetic, rotation and count	79	37	61	13	74	30	76	33	69	23	72	27
Arithmetic, letter and count	75	31	63	16	76	32	75	32	71	25	72	27
Rotation, letter and count	72	27	64	17	66	19	72	27	62	14	67	21
SSVEP: 6, 13 and 16 Hz	78	36	66	19	70	24	70	24	71	25	71	25
Mean	79	34	69	21	73	25	75	28	73	27	74	27

Mean classification for all task combinations = 74% and mean bit rate= 27 bit/min

ISSN: 1475-925X