Abstract：
:Repetition of visually common objects was examined in relation to prior intentional learning and memory status using a delayed match-to-sample task in humans. Both response time and two temporally separate event-related potential (ERP) components indexed repetition. The early repetition effect ( approximately 200-550 ms) evoked more ERP responses for repeated visual objects, and was diminished by prior intentional learning (old/new) or being maintained in working memory (targets/distracters). In contrast, the late repetition effect (after approximately 550 ms) evoked reduced ERP activation for repeated items, and was not affected by prior learning or working memory status. Our source localization results indicate that the late and posterior repetition effect in visual cortex is consistent with repetition suppression results reported in monkey physiology and human fMRI studies. Meanwhile, the early and anterior repetition effect, in temporal pole and frontal cortices, is modulated by explicit memory mechanisms.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Guo C,Lawson AL,Jiang Ydoi
10.1016/j.neuroscience.2007.07.060subject
Has Abstractpub_date
2007-11-23 00:00:00pages
747-59issue
4eissn
0306-4522issn
1873-7544pii
S0306-4522(07)00909-8journal_volume
149pub_type
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