Abstract:
:Decades of neuroscience research have shed light on the hippocampus as a key structure for the formation of episodic memory. The hippocampus is divided into distinct subfields - CA1, CA2 and CA3. While accumulating evidence points to cellular and synaptic heterogeneity within each subfield, this heterogeneity has not received much attention in computational and behavioural studies and subfields have until recently been considered functionally uniform. However, a couple of recent studies have demonstrated prominent functional differences along the proximodistal axis of the CA1 subfield. Here, we review anatomical and physiological differences that might give rise to heterogeneity along the proximodistal axis of CA1 as well as the functional implications of such heterogeneity. We suggest that such heterogeneity in CA1 operates dynamically in the sense that the CA1 network alternates, on a subsecond scale, between a state where the network is primarily responsive to functionally segregated direct inputs from entorhinal cortex and a state where cells predominantly are controlled by more integrated inputs from CA3.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Igarashi KM,Ito HT,Moser EI,Moser MBdoi
10.1016/j.febslet.2014.06.004subject
Has Abstractpub_date
2014-08-01 00:00:00pages
2470-6issue
15eissn
0014-5793issn
1873-3468pii
S0014-5793(14)00444-Xjournal_volume
588pub_type
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