The relationship between task-related and subsequent memory effects

摘要: The primary aim of this fMRI study was to assess the proposal that negative subsequent memory effects – greater activity for later forgotten relative remembered items are localized regions demonstrating task-negative effects, and hence potential components default mode network. Additionally, we assessed whether positive overlapped with task-positive effects. Eighteen participants were scanned while they made easy or difficult relational judgments on visually presented word pairs. Easy hard task blocks interleaved fixation-only rest periods. In unscanned test phase, associative recognition required intact pairs (studied pairs), rearranged (pairs formed from words different trials) new Subsequent identified by contrasting elicited went be correctly endorsed as versus incorrectly rearranged. Task all blocks. Both evident in widespread cortical generally confined respectively. However, could only a fraction task-sensitive voxels and, unlike insensitive difficulty manipulation. findings consistent recent proposals network is functionally heterogeneous, suggest these not accurately characterized reflections modulation whole.