期刊
PSYCHOLOGICAL SCIENCE
卷 18, 期 11, 页码 927-932出版社
SAGE PUBLICATIONS INC
DOI: 10.1111/j.1467-9280.2007.02003.x
关键词
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资金
- NIMH NIH HHS [MH61975, MH062196, MH072138, R01 MH061975, P50 MH062196, F31 MH072138] Funding Source: Medline
- NINDS NIH HHS [R01 NS048598-02, R01 NS048598, R01 NS041811-08, R01 NS041811] Funding Source: Medline
To test whether distinct patterns of electro-physiological activity prior to a response can distinguish true from false memories, we analyzed intracranial electroencephalographic recordings while 52 patients undergoing treatment for epilepsy performed a verbal free-recall task. These analyses revealed that the same pattern of gamma-band (28-100 Hz) oscillatory activity that predicts successful memory formation at item encoding-increased gamma power in the hippocampus, prefrontal cortex, and left temporal lobe-reemerges at retrieval to distinguish correct from incorrect responses. The timing of these oscillatory effects suggests that self-cued memory retrieval begins in the hippocampus and then spreads to the cortex. Thus, retrieval of true, as compared with false, memories induces a distinct pattern of gamma oscillations, possibly reflecting recollection of contextual information associated with past experience.
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