Human hippocampal pre-activation predicts behavior.
Human hippocampal pre-activation predicts behavior.
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DOI:
10.1038/s41598-017-06477-5
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发表时间:
2017-07-20
影响因子:
4.6
通讯作者:
Knight RT
中科院分区:
文献类型:
--
作者:
Jafarpour A;Piai V;Lin JJ;Knight RT
The response to an upcoming salient event is accelerated when the event is expected given the preceding events – i.e. a temporal context effect. For example, naming a picture following a strongly constraining temporal context is faster than naming a picture after a weakly constraining temporal context. We used sentences as naturalistic stimuli to manipulate expectations on upcoming pictures without prior training. Here, using intracranial recordings from the human hippocampus we found more power in the high-frequency band prior to high-expected pictures than weakly expected ones. We applied pattern similarity analysis on the temporal pattern of hippocampal high-frequency band activity in single hippocampal contacts. We found that greater similarity in the pattern of hippocampal field potentials between pre-picture interval and expected picture interval in the high-frequency band predicted picture-naming latencies. Additional pattern similarity analysis indicated that the hippocampal representations follow a semantic map. The results suggest that hippocampal pre-activation of expected stimuli is a facilitating mechanism underlying the powerful contextual behavioral effect.
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DOI:
10.1523/jneurosci.2041-09.2009
发表时间:
2009-10-28
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Manning JR;Jacobs J;Fried I;Kahana MJ
通讯作者:
Kahana MJ
影响因子:
16.6
作者:
Horner AJ;Bisby JA;Bush D;Lin WJ;Burgess N
通讯作者:
Burgess N
影响因子:
7.7
作者:
Ólafsdóttir HF;Barry C;Saleem AB;Hassabis D;Spiers HJ
通讯作者:
Spiers HJ
影响因子:
4.6
作者:
Martin S;Brunner P;Iturrate I;Millán Jdel R;Schalk G;Knight RT;Pasley BN
通讯作者:
Pasley BN
影响因子:
1.8
作者:
Howard, MW;Kahana, MJ
通讯作者:
Kahana, MJ