Basic characteristics of auditory-evoked potentials evoked by tone series of two different frequencies within the CA1 region of the dorsal hippocampus in CB1−/− (n = 5) and CB1+/+ (n = 6) during the baseline period day −2 and day −1 (compare Fig. 2)
| Genotype | 6 kHz | 12 kHz | ||||
|---|---|---|---|---|---|---|
| Latency (ms) | Amplitude (μV) | Slope (μV/ms) | Latency (ms) | Amplitude (μV) | Slope (μV/ms) | |
| CB1−/− | 28.9 ± 2.2 | 195.6 ± 44.3 | −24.6 ± 6.0 | 28.1 ± 1.8 | 172.3 ± 41.3 | −21.2 ± 3.9 |
| CB1+/+ | 27.3 ± 3.1 | 113.4 ± 25.0 | −21.3 ± 4.5 | 27.3 ± 2.6 | 144.7 ± 25.3 | −26.3 ± 5.5 |
None of these parameters differed significantly between the two genotypes and the two tone frequencies (genotype: F(1,10) < 1.9, p > 0.202; frequency: F(1,10) < 0.5, p > 0.510; genotype by frequency: F(1,10) < 1.6, p > 0.240).