Internally generated cell assembly sequences in the rat hippocampus.
Internally generated cell assembly sequences in the rat hippocampus.
复制标题
大鼠海马中内部生成的细胞组装序列。
DOI:
10.1126/science.1159775
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发表时间:
2008-09-05
期刊:
影响因子:
56.9
通讯作者:
Buzsaki, Gyoergy
中科院分区:
文献类型:
--
作者:
Pastalkova, Eva;Itskov, Vladimir;Amarasingham, Asohan;Buzsaki, Gyoergy
A longstanding conjecture in neuroscience is that aspects of cognition depend on the brain's ability to self-generate sequential neuronal activity. We found that reliably and continually-changing cell assemblies in the rat hippocampus appeared not only during spatial navigation but also in the absence of changing environmental or body-derived inputs. During the delay period of a memory task each moment in time was characterized by the activity of a unique assembly of neurons. Identical initial conditions triggered a similar assembly sequence, whereas different conditions gave rise, uniquely, to different sequences, thereby predicting behavioral choices, including errors. Such sequences were not formed in control, non-memory, tasks. We hypothesize that neuronal representations, evolved for encoding distance in spatial navigation, also support episodic recall and the planning of action sequences.
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