Abstract：
:Grid cells in layer II of the medial entorhinal cortex form a principal component of the mammalian neural representation of space. The firing pattern of a single grid cell has been hypothesized to be generated through attractor dynamics in a network with a specific local connectivity including both excitatory and inhibitory connections. However, experimental evidence supporting the presence of such connectivity among grid cells in layer II is limited. Here we report recordings from more than 600 neuron pairs in rat entorhinal slices, demonstrating that stellate cells, the principal cell type in the layer II grid network, are mainly interconnected via inhibitory interneurons. Using a model attractor network, we demonstrate that stable grid firing can emerge from a simple recurrent inhibitory network. Our findings thus suggest that the observed inhibitory microcircuitry between stellate cells is sufficient to generate grid-cell firing patterns in layer II of the medial entorhinal cortex.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Couey JJ,Witoelar A,Zhang SJ,Zheng K,Ye J,Dunn B,Czajkowski R,Moser MB,Moser EI,Roudi Y,Witter MPdoi
10.1038/nn.3310subject
Has Abstractpub_date
2013-03-01 00:00:00pages
318-24issue
3eissn
1097-6256issn
1546-1726pii
nn.3310journal_volume
16pub_type
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