Abstract

ative to encoding, and the level of activation was Instructions were to respond "old" only if drawings insensitive to the amount of successful retrieval. These were not modified (specific test) or regardless of modi- researchers concluded that activation of right prefrontal fications (general test). Frontal potentials were en- cortex is related to the attempt to retrieve information, hanced during the specific relative to the general test regardless of the success or failure of the attempt. for all three types of drawings. We conclude that these However, prefrontal activation was associated with potentials reflected differential engagement of strate- retrieval success in a subsequent PET study (Rugg et gic retrieval, that this function relied on left prefrontal al., 1996). This association was based on a comparison cortex, and that it was not contingent on successful

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