Figure 3.

Spatial filter topographies and responses in the no-adaptation block. A, Spatial filter topographies for younger and older adults. B, Source localization of spatial filter topographies (LH, left hemisphere; RH, right hemisphere). Note that source localization could be performed for only 14/19 younger and 12/20 older participants for whom MRIs were available. The apparently larger right hemisphere source strength for older people, evident in B, is probably an artifact of a relatively small dataset: note that it is not evident in A, where topographies of all 20 older adults were averaged. C, Neural response time courses in the no-adaptation block (error bars reflect the SEM). The black line at the bottom indicates a significant difference between age groups (p < 0.05; FDR corrected). The box plots above the M100 wave show significantly earlier M100 latencies for older compared with younger adults (*p < 0.05).