David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
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Katharina Henke, Valerie Treyer, Eva T. Nagy, Stefan Kneifel, Max Düsteler, Roger M. Nitsch & Alfred Buck
Consciousness and Cognition 12 (1):31-48 (2003)
The hippocampal formation is known for its importance in conscious, declarative memory. Here, we report neuroimaging evidence in humans for an additional role of the hippocampal formation in nonconscious memory. We maskedly presented combinations of faces and written professions such that subjects were not aware of them. Nevertheless, the masked presentations activated many of the brain regions that unmasked presentations of these stimuli did. To induce a nonconscious retrieval of the faces and face-associated occupational information, subjects were instructed to view the previously masked faces and to guess the professional category of each person—academic, artist, and workman. Guessing the professional category of previously masked versus new faces activated the left and right hippocampal formation and right perirhinal cortex as well as bilateral fusiform areas and fronto-temporal areas known to mediate the retrieval of semantic information. These activations within the semantic processing system suggest that conceptual knowledge acquired during masking was nonconsciously retrieved. Our data provide clues to an analogous role of the hippocampus in conscious and nonconscious memory
|Keywords||*Consciousness States *Hippocampus *Human Information Storage *Long Term Memory *Memory|
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Simone B. Duss, Sereina Oggier, Thomas P. Reber & Katharina Henke (2011). Formation of Semantic Associations Between Subliminally Presented Face-Word Pairs. Consciousness and Cognition 20 (3):928-935.
Thomas P. Reber & Katharina Henke (2012). Integrating Unseen Events Over Time. Consciousness and Cognition 21 (2):953-960.
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