Video 2:

An example of the evolution of the spatial and temporal intensity functions of a CA1 neuron. See the legend for Video 1 for an explanation of the two graphs. The spatial intensity function corresponding to movement from left to right is shown in yellow, and the spatial intensity function corresponding to movement from right to left is shown in orange. Both spatial intensity functions increase in area over the course of the run, and the left to right (yellow) intensity function becomes more negatively skewed over time. In addition, there is a small increase in the theta region of the temporal intensity function, although this region shows high variability.

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Video 3:

An example of the evolution of the spatial and temporal intensity functions of a deep EC neuron whose spatial intensity function increased by >20%. See the legend for Video 1 for an explanation of the two graphs. The spatial intensity function of this neuron showed a large increase in firing in a restricted region of the environment. In addition, the burst-to-theta (21-75 ms) region of the temporal intensity function increased markedly.

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Video 4:

An example of the evolution of the spatial and temporal intensity functions of a deep EC neuron whose spatial intensity function decreased over time. See the legend for Video 1 for an explanation of the two graphs. The spatial intensity function of this neuron shows a large decrease over two distinct but large regions of the environment. In addition, the burst-to-theta (21-75 ms) region of the temporal intensity function decreased markedly. Note also that this neuron fired during the first half of each pass, peaking near the turn in the U track. This “path equivalence,” in which the neuron fired in the same relative locations on the two paths through the environment, is common in the deep EC.

Microsoft AVI Video