TY - JOUR
T1 - A double dissociation between hippocampal subfields
T2 - Differential time course of CA3 and CA1 place cells for processing changed environments
AU - Lee, Inah
AU - Rao, Geeta
AU - Knierim, James J.
N1 - Funding Information:
We thank Sheri J.Y. Mizumori, Harel Z. Shouval, and D. Yoganarasimha for their valuable comments on the manuscript; and D. Yoganarasimha for assistance in data acquisition. This work was supported by NIH grants RO1 NS29456 and K02 MH63297 and by the Lucille P. Markey Charitable Trust.
PY - 2004/6/10
Y1 - 2004/6/10
N2 - Computational theories have suggested different functions for the hippocampal subfields (e.g., CA1 and CA3) in memory. However, it has been difficult to find dissociations relevant to these hypothesized functions in investigations of the hippocampal correlates of space ("place fields") in freely behaving animals. The current study demonstrates a double dissociation between the shifts in the center of mass (COM) of the place fields that were simultaneously recorded in CA1 and CA3 when familiar cue configurations were dynamically changed over days. The COM of CA3 place fields shifted backward in the first experience of the cue-changed environment, whereas the COM of CA1 place fields did not display the backward shift until the next day. These results support the hypothesis that CA3 plays a key role in the rapid formation of representations of new spatiotemporal sequences, whereas CA1 may be more important for comparing currently experienced sequence information with stored sequences in the CA3 network.
AB - Computational theories have suggested different functions for the hippocampal subfields (e.g., CA1 and CA3) in memory. However, it has been difficult to find dissociations relevant to these hypothesized functions in investigations of the hippocampal correlates of space ("place fields") in freely behaving animals. The current study demonstrates a double dissociation between the shifts in the center of mass (COM) of the place fields that were simultaneously recorded in CA1 and CA3 when familiar cue configurations were dynamically changed over days. The COM of CA3 place fields shifted backward in the first experience of the cue-changed environment, whereas the COM of CA1 place fields did not display the backward shift until the next day. These results support the hypothesis that CA3 plays a key role in the rapid formation of representations of new spatiotemporal sequences, whereas CA1 may be more important for comparing currently experienced sequence information with stored sequences in the CA3 network.
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U2 - 10.1016/j.neuron.2004.05.010
DO - 10.1016/j.neuron.2004.05.010
M3 - Article
C2 - 15182719
AN - SCOPUS:2942523944
SN - 0896-6273
VL - 42
SP - 803
EP - 815
JO - Neuron
JF - Neuron
IS - 5
ER -