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. 2008 Mar 6;116(6):752–760. doi: 10.1289/ehp.11089

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Amplitudes (mean ± SE) of PS (A) and EPSP slope (B) in the dentate gyrus in adult male rats exposed to perchlorate from GD6 to PND30. The inset in (A) depicts a typical response to a high-intensity pulse and how the PS was scored on each averaged waveform at each intensity for each subject. The inset in (B) depicts a response to a high-intensity pulse and the points on the rising phase of the waveform between which the slope was calculated as an estimate of EPSP amplitude.