Time cells in the human hippocampus and entorhinal cortex support episodic memory.
Time cells in the human hippocampus and entorhinal cortex support episodic memory.
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DOI:
10.1073/pnas.2013250117
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发表时间:
2020-11-10
影响因子:
11.1
通讯作者:
Lega B
中科院分区:
文献类型:
--
作者:
Umbach G;Kantak P;Jacobs J;Kahana M;Pfeiffer BE;Sperling M;Lega B
Time cells are neurons in the hippocampus and entorhinal cortex that fire at specific moments within a cognitive task or experience. While many prominent theories of memory encoding offer time cells as the source of the temporal component to memory, they have never been observed in human recordings. We identify time cell populations in the medial temporal lobe of humans during memory encoding and retrieval. Further, we demonstrate that the stability of the time signal provided by time cells during encoding influences the ability to temporally order memories at time of retrieval. The organization of temporal information is critical for the encoding and retrieval of episodic memories. In the rodent hippocampus and entorhinal cortex, evidence accumulated over the last decade suggests that populations of “time cells” in the hippocampus encode temporal information. We identify time cells in humans using intracranial microelectrode recordings obtained from 27 human epilepsy patients who performed an episodic memory task. We show that time cell activity predicts the temporal organization of retrieved memory items. We also uncover evidence of ramping cell activity in humans, which represents a complementary type of temporal information. These findings establish a cellular mechanism for the representation of temporal information in the human brain needed to form episodic memories.
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影响因子:
16.6
作者:
Ezzyat Y;Wanda PA;Levy DF;Kadel A;Aka A;Pedisich I;Sperling MR;Sharan AD;Lega BC;Burks A;Gross RE;Inman CS;Jobst BC;Gorenstein MA;Davis KA;Worrell GA;Kucewicz MT;Stein JM;Gorniak R;Das SR;Rizzuto DS;Kahana MJ
通讯作者:
Kahana MJ
影响因子:
56.9
作者:
Fyhn, M;Molden, S;Moser, MB
通讯作者:
Moser, MB
影响因子:
5.3
作者:
Howard, Marc W.;MacDonald, Christopher J.;Eichenbaum, Howard
通讯作者:
Eichenbaum, Howard
影响因子:
3
作者:
Kempter, Richard;Leibold, Christian;Schmidt, Robert
通讯作者:
Schmidt, Robert
影响因子:
1.8
作者:
Howard, MW;Kahana, MJ
通讯作者:
Kahana, MJ