Fig. 3.

Beamformer contrast images (band-pass filtered 30–80 Hz) measured as percentage change between stimulus and baseline, projected onto a template brain surface. This is shown for controls (left column) and MS patients (middle column). The right column illustrates the t-statistic values for the difference between patients and controls (negative values indicating lower amplitude for patients than controls). Simply for illustration purposes, t-values are plotted here at the uncorrected level. The data were averaged over both eyes. Only right medial and lateral views are shown; the same trends were seen for left.