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Table 3 Mean amplitudes

From: Successful syllable detection in aphasia despite processing impairments as revealed by event-related potentials

electrode group N1 N1 target P3 N2 175–225 ms N2 225–275 ms N2 275–325 ms
  severe -0,16 (1,02) -1,55 (1,82) 1,43 (4,39) -1,41 (4,26) -1,89 (4,32) -1,98 (3,35)
F3 moderate -2,44 (1,43) -1,98 (2,16) 1,67 (2,58) -0,46 (1,96) 0,35 (2,83) 1,61 (3,16)
  control -3,18 (1,09) -4,04 (1,35) 1,93 (2,99) -3,21 (1,62) -3,57 (3,07) -2,34 (4,77)
  severe -1,12 (1,26) -1,35 (1,34) 3,11 (4,40) -0,53 (1,94) -0,31 (2,24) -0,11 (3,63)
Fz moderate -3,22 (1,44) -2,51 (2,23) 2,80 (3,31) -0,82 (1,99) -0,05 (3,09) 1,70 (3,11)
  control -4,52 (1,39) -4,92 (1,97) 2,60 (3,87) -3,20 (2,14) -4,84 (3,81) -3,91 (5,13)
  severe -0,76 (1,12) -1,13 (0,97) 1,98 (3,48) -1,41 (1,64) -1,01 (3,07) 0,17 (3,87)
F4 moderate -2,13 (1,72) -2,14 (1,44) 2,36 (3,75) -0,54 (1,45) 0,37 (2,59) 1,78 (3,55)
  control -3,09 (0,65) -3,54 (1,96) 2,14 (3,66) -1,86 (2,90) -3,26 (3,86) -1,78 (5,46)
  severe -1,13 (2,16) -2,71 (3,43) 1,82 (3,45) -2,61 (7,36) -1,34 (5,78) -1,68 (4,02)
C3 moderate -3,76 (1,38) -3,42 (3,16) 3,52 (3,48) -3,82 (3,51) -0,49 (4,46) 2,80 (3,31)
  control -5,65 (2,02) -7,05 (2,73) 2,12 (4,23) -7,03 (3,46) -6,87 (4,44) -5,29 (5,96)
  severe -2,54 (2,12) -2,70 (2,49) 3,03 (4,10) -1,60 (4,35) -0,98 (4,25) -0,94 (4,37)
Cz moderate -4,31 (1,30) -2,96 (2,84) 3,94 (3,93) -4,25 (4,64) -1,33 (4,78) 2,51 (3,89)
  control -7,01 (2,09) -7,20 (3,11) 2,50 (4,20) -5,56 (3,93) -8,87 (6,86) -8,28 (7,36)
  severe -2,38 (1,96) -3,17 (2,63) 2,89 (3,85) -2,91 (2,83) -2,24 (3,36) -1,11 (4,57)
C4 moderate -3,20 (1,74) -3,39 (2,23) 3,63 (3,64) -4,74 (3,62) -2,47 (2,64) 1,40 (3,40)
  control -5,45 (1,06) -6,02 (2,45) 2,60 (3,94) -5,60 (3,67) -7,68 (5,08) -5,93 (5,61)
  severe -0,98 (2,20) -2,20 (2,63) 2,06 (3,42) -1,57 (2,79) -0,85 (3,17) -0,73 (3,76)
P3 moderate -1,55 (1,10) -1,50 (3,20) 3,47 (3,83) -2,51 (3,26) 0,56 (3,55) 3,67 (4,51)
  control -3,09 (1,25) -4,02 (2,14) 3,63 (3,61) -6,18 (3,69) -7,25 (4,95) -5,35 (6,38)
  severe -1,79 (1,81) -3,08 (2,61) 2,60 (4,08) -1,45 (2,83) -1,20 (2,88) -0,71 (4,24)
Pz moderate -2,26 (1,18) -2,14 (3,50) 4,58 (3,96) -3,77 (4,10) -0,76 (3,89) 2,90 (5,04)
  control -4,37 (1,59) -5,22 (2,48) 4,32 (4,25) -6,08 (4,33) -8,54 (6,43) -6,89 (6,94)
  severe -0,98 (1,59) -2,61 (2,10) 2,83 (3,70) -2,35 (2,42) -2,33 (2,54) -1,25 (4,50)
P4 moderate -0,94 (1,00) -1,49 (2,52) 3,38 (3,12) -3,57 (3,59) -1,04 (3,15) 1,65 (4,67)
  control -2,92 (1,57) -4,29 (2,51) 3,47 (3,81) -6,14 (3,52) -7,77 (4,98) -4,92 (6,03)
  1. Mean amplitudes and standard deviations (parentheses) for some selected electrodes for each group respectively. N1 elicited by standard and target syllable and P3 are shown; in addition those intervals from the subtraction wave where significant differences between groups were observed.