Decoding individual episodic memory traces in the human hippocampus.
Decoding individual episodic memory traces in the human hippocampus.
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DOI:
10.1016/j.cub.2010.01.053
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发表时间:
2010-03-23
期刊:
影响因子:
--
通讯作者:
Maguire EA
中科院分区:
文献类型:
--
作者:
Chadwick MJ;Hassabis D;Weiskopf N;Maguire EA
In recent years, multivariate pattern analyses have been performed on functional magnetic resonance imaging (fMRI) data, permitting prediction of mental states from local patterns of blood oxygen-level-dependent (BOLD) signal across voxels. We previously demonstrated that it is possible to predict the position of individuals in a virtual-reality environment from the pattern of activity across voxels in the hippocampus. Although this shows that spatial memories can be decoded, substantially more challenging, and arguably only possible to investigate in humans, is whether it is feasible to predict which complex everyday experience, or episodic memory, a person is recalling. Here we document for the first time that traces of individual rich episodic memories are detectable and distinguishable solely from the pattern of fMRI BOLD signals across voxels in the human hippocampus. In so doing, we uncovered a possible functional topography in the hippocampus, with preferential episodic processing by some hippocampal regions over others. Moreover, our results imply that the neuronal traces of episodic memories are stable (and thus predictable) even over many re-activations. Finally, our data provide further evidence for functional differentiation within the medial temporal lobe, in that we show the hippocampus contains significantly more episodic information than adjacent structures. ► It is possible to decode specific episodic memory traces from fMRI activity ► Individual memories can be decoded from fMRI activity in the human hippocampus (HC) ► The HC contains significantly more episodic information than adjacent brain areas ► Episodic information is localized to bilateral anterior and right posterior HC
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发表时间:
2000-09-26
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
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发表时间:
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影响因子:
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通讯作者:
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发表时间:
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期刊:
Science (New York, N.Y.)
影响因子:
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