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. 2001 Sep 15;21(18):7284–7292. doi: 10.1523/JNEUROSCI.21-18-07284.2001

Fig. 2.

Fig. 2.

Histological verification of electrode placement. A coronal section of the hippocampus stained with cresyl violet is shown. For each rat, one tetrode, assumed on physiological grounds to be in the CA1 pyramidal layer, and a second tetrode, assumed to be in the granular layer of the DG (see Materials and Methods), were selected. Lesions were produced after the final recording session by passing 5 μA of cathodal current through a tetrode for 5 sec. Additional electrode tracks are visible above the two lesions, medial to the dentate gyrus lesion and lateral to the CA1 lesion. In this rat, all the electrode tracks were medial to the CA3c region, thus ruling out misidentification of CA3 pyramidal cells as PG cells.

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