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Cover picture: Place selectivity of rat hippocampal
pyramidal cells during performance of an eight-item
spatial sequence task containing a nested repeating
segment. A rat was trained to run continuously to a
sequence of goals located around the perimeter of a
circular table. Gray lines show trajectories for ~100
traversals of the sequence. Multitetrode recording
was used to monitor the activity of 57 dorsal CA1 cells.
Data shown are from seven pyramidal cells with well
defined place fields. Locations where spikes were
recorded are shown as colored dots, where each color
corresponds to a different cell. Rats learned the sequence
task easily, but CA1 cells did not discriminate sequential
context when the rat traversed the repeated segments.
For details, see the article by Bower et al. in this issue
(pages 1313-1323).
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