Spline Topography Maps (New

1
Spline Topography Maps
(New Repeated, 50 ms
epochs)

3
2
1
0

-1
-2
-3
Supplementary Figure. Grand average ERPs for
Normal Old, MCI Stable and MCI Converter groups
to new semantically congruous words (solid
lines), and new incongruous words (dotted lines)
at Year 1 (left side) and Year 2 (right side).
The N400 congruity effect, which normally shows
smaller N400s to congruous words, is indicated at
WR (shaded between 300 and 500 ms). Spherical
spline topographical maps (in color, center)
illustrate the N400 congruity effect (ERPs to
incongruous minus congruous words) in consecutive
50 ms epochs for Normal Old (left) and MCI Stable
(left middle) groups at Year 1, and MCI
Converters at Year 1 (right middle) and Year 2
(right).