TABLE 1.
Comparison of excitatory and inhibitory tuning and FM sweep selectivity between urethan- and barbiturate-anesthetized bats
| Urethane | Barbiturate | P-value | |
|---|---|---|---|
| BW 10 dB, kHz | 5.2 ± 0.5 (39) | 5 ± 0.4 (66) | 0.74 |
| BW 20 dB | 7.2 ± 0.9 (39) | 6.7 ± 0.6 (66) | 0.66 |
| 50% arrival time | |||
| LFI | −0.45 ± 0.04 (21) | −0.34 ± 0.19 (40) | 0.76 |
| HFI | 2.5 ± 0.34 (12) | 3.2 ± 0.5 (26) | 0.29 |
| Bandwidth | |||
| LFI | 9.1 ± 1.4 kHz (14) | 12.4 ± 1.7 kHz (36) | 0.23 |
| HFI | 2.4 ± 0.2 kHz (8) | 2.8 ± 0.4 kHz (21) | 0.57 |
| Duration | |||
| LFI | 20.75 ± 4.8 msec (20) | 128.1 ± 16 msec (25) | <0.0001* |
| HFI | 14.9 ± 1.2 msec (12) | 149.7 ± 17 msec (21) | <0.0001* |
| FM 50% cut-off rate | 1.5 ± 0.1 kHz/msec (32) | 1.51 ± 0.2 kHz/msec (41) | 0.90 |
| Best FM rate | 4.1 ± 0.3 kHz/msec (32) | 3.6 ± 0.3 kHz/msec (29) | 0.23 |
| DSI | 0.56 ± 0.06 (38) | 0.62 ± 0.06 (51) | 0.44 |
Numbers indicate means ± SE. n values in parentheses. LFI and HFI, low- and high-frequency inhibition; DSI, direction selectivity index.