Figure 6.

Snapshots of activity evoked by novel versus repeated words in a semantic judgment task at two different latencies are displayed on an “inflated” (54) left hemisphere. These data represent MEG data constrained by structural MRI and fMRI providing an image of cortical activity that is sensitive to fine spatial as well as temporal changes (46). By combining separate methods it is possible to obtain information unavailable from data produced by either method alone. Event-related fMRI, which can allow task paradigms that randomly intermix trial types at rapid rates, will further allow fMRI, MEG, and EEG to be combined in paradigms that are identical across methods.