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Table 1 Parameters and appearances of eight classes of stable SEP t-f components. The values of parameters are given as mean ± SD (CV).

From: Time-frequency component analysis of somatosensory evoked potentials in rats

Class A B C D
Latency t (ms) 37.35 ± 10.60 (28) 35.34 ± 9.33 (26) 75.83 ± 7.03 (9) 15.37 ± 10.61 (69)
Frequency f (Hz) 30.04 ± 12.54 (42) 64.63 ± 21.27 (33) 20.75 ± 9.17 (44) 126.31 ± 25.04 (20)
Time span s (ms) 41.03 ± 17.69 (43) 29.72 ± 14.65 (49) 52.46 ± 32.47 (62) 25.93 ± 15.77 (61)
Phase φ (rad) 0.07 ± 0.02 (--) -0.05 ± 0.02 (--) -0.01 ± 0.03 (--) 0.01 ± 0.02 (--)
Amplitude a (μ V) 2.18 ± 1.14 (52) 0.50 ± 0.28 (56) 0.75 ± 0.30 (40) 0.10 ± 0.06 (60)
Relative Energy (%) 60.67 ± 12.72 (21) 7.50 ± 5.03 (67) 10.03 ± 4.80 (48) 0.43 ± 0.20 (47)
Appearances 25 18 14 15
Appearance Rate (%) 89.29 64.29 50.00 53.57
Class E F G H
Latency t (ms) 24.38 ± 6.75 (28) 48.12 ± 5.22 (11) 71.46 ± 6.05 (8) 89.63 ± 5.36 (6)
Frequency f (Hz) 30.60 ± 11.87 (39) 35.04 ± 12.28 (35) 28.77 ± 14.10 (49) 28.29 ± 13.87 (49)
Time span s (ms) 21.96 ± 14.67 (67) 11.90 ± 8.78 (74) 18.15 ± 12.81 (71) 13.21 ± 9.66 (73)
Phase φ (rad) -0.02 ± 0.04 (--) -0.08 ± 0.02 (--) -0.03 ± 0.06 (--) -0.04 ± 0.03 (--)
Amplitude a (μ V) 0.07 ± 0.03 (43) 0.13 ± 0.08 (62) 0.06 ± 0.03 (50) 0.11 ± 0.08 (73)
Relative Energy (%) 0.12 ± 0.10 (83) 0.20 ± 0.13 (65) 0.09 ± 0.08 (89) 0.25 ± 0.15 (60)
Appearances 16 14 17 15
Appearance Rate (%) 57.14 50.00 60.71 53.57