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Eur J Neurosci. 2001 Mar;13(5):1055-8.

Place-cell firing does not depend on the direction of turn in a Y-maze alternation task.

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Centre for Research in Cognitive Neuroscience, Centre National de la Recherche Scientifique, 31 chemin Joseph-Aiguier, 13402 Marseille Cedex 20, France.


Hippocampal place cells were recorded while rats solved a continuous spatial alternation task requiring short-term spatial memory. All cells that had a firing field on the stem of the Y-shaped maze were found to have a very similar pattern of discharge whether the rat was about to make a right or a left turn, and whether the preceding turn was a right or a left turn. Thus, the view that place cells encode a variety of events (including the direction of turns) useful for solving memory tasks is not well supported by the present data. We suggest several possible explanations to account for the discrepancy with other recent studies showing turn-related modulation of place-cell activity.

[Indexed for MEDLINE]

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