Table 2. Physiological response properties of different clusters of AVCN units according to hierarchical cluster analysis using all evaluated properties.
| response properties | Clustera | Statistical analyses | |||||
| I | II | III | IV | V | ANOVA | Post-hoc testb | |
| Frequency tuning curve | n = 54 | n = 43 | n = 20 | n = 38 | n = 78 | ||
| CF [kHz] | 21.8 (8.6; 31.9) | 13.1 (1.7, 22.1) | 14.7 (4.0; 27.8) | 2.3 (1.2; 9.0) | 5.8 (1.9; 16.3) | P<0.001 | (I III) (II III IV) (II IV V) |
| TRS [dB] | 45 (35; 60) | 25 (20; 45) | 35 (30; 48) | 35 (25; 45) | 15 (0; 25) | P<0.001 | (I III IV) (II III IV) (V) |
| CF-BF [octaves] | 0.09 (0; 0.56) | 0 (0.02; 0.97) | 2.17 (1.09; 2.72) | 0 (0; 0.69) | 0 (0; 0.28) | P<0.001 | (I II IV V) (III) |
| BF-CF [Hz] | 8 (0; 31) | 8 (0; 21) | 151 (92; 206) | 6 (0; 26) | 0 (0; 19) | P<0.00 | (I II IV V) (III) |
| spontR [Hz] | 1 (0; 13) | 6 (0; 39) | 0 (0; 9) | 69 (32; 87) | 9 (0; 30) | P<0.001 | (I II III V) (IV) |
| maxR [Hz] | 212 (171; 277) | 138 (113, 171) | 307 (238; 376) | 186 (141; 268) | 324 (248; 428) | P<0.001 | (I III) (I IV) (III IV) (II) |
| Q10 | 2.47 (1.21; 3.81) | 2.05 (1.38; 4.05) | 2.36 (0.97; 5.43) | 2.16 (1.79; 2.79) | 1.72 (1.24; 2.97) | P = 0.219 | (I II III IV V) |
| DR [dB] | 36±14 | 28±13 | 48±18 | 27±16 | 42±13 | P<0.001 | (I) (II IV) (III V) |
| difference of slopes [octaves/10 dB] | 0.13 (0.06; 0.27) | 0.14 (0.05; 0,21) | 0.49 (0.11; 0.93) | 0.12 (0.05; 0.27) | 0.10 (0.02; 0.24) | P<0.05 | (I II II IV) (I II IV V) |
| PSTH | n = 41 | n = 43 | n = 13 | n = 14 | n = 70 | ||
| peak-over-total [%] | 10.3 (8.5; 13.1) | 3.9 (2.4; 5.8) | 6.8 (3.4; 8.7) | 12.8 (7.9; 17.6) | 10.4 (8.4, 14.2) | P<0.001 | (I IV V) (II III) |
| ISI mean [ms] | 3.3 (2.6; 3,8) | 4.5 (3.8; 5.4) | 2.5 (1.9; 3.4) | 2.9 (2.6; 3.2) | 2.2 (1.9; 2.8) | P<0.001 | (I III ) (II) (II IV V) |
| ISI S.D. [ms] | 1.59 (1.12, 2.16) | 2.74 (2.42; 3.49) | 1.81 (1.11; 2.33) | 1.61 (1.0; 2.07) | 0.86 (0.58; 1.38) | P<0.001 | (I II IV) (II) (IV V) |
| FSL mean [ms] | 4.76 (3.70, 7.02) | 4.06 (3.60; 4.91) | 3.64 (3.16; 4.86) | 3.81 (3.20; 4.27) | 3.85 (3.30; 4.40) | P<0.001 | (I II) (II III IV V) |
| FSL jitter [ms] | 0.44 (0.25; 0.79) | 0.80 (0.36; 1,43) | 0.20 (0.12; 0.30) | 1.39 (1.22; 1.86) | 0.31 (0.15; 076) | P<0.001 | (I II III IV) (II IV) (III V) (IV) |
| SAM | n = 7 | n = 19 | n = 4 | n = 3 | n = 26 | ||
| VS max | 0.73±0.16 | 0.60±0.16 | 0.60±0.23 | 0.77±0.11 | 0.62±0.17 | P = 0.251 | (I II III IV V) |
| fmod VSmax [Hz] | 200 (200; 200) | 100 (50 200) | 300 (110, 600) | 200 (125; 275) | 200 (50 200) | P = 0.671 | (I II III IV V) |
| fmod VS>0,3 [Hz] | 729±198 | 616±348 | 638±411 | 833±116 | 515±262 | P = 0.255 | (I II III IV V) |
| entr max | 0.81±0.11 | 0.62±0.11 | 0.59±0.30 | 0.90±0.06 | 0.77±0.18 | P<0.01 | (I II III IV) (I III IV V) |
| fmod entr max [Hz] | 200 (200; 200) | 100 (50; 100) | 200 (125; 250) | 200 (200; 275) | 200 (200; 300) | P<0.001 | (I II III IV) (I III IV V) |
| Waveform | n = 37 | n = 36 | n = 12 | n = 14 | n = 55 | ||
| SNR | 7.6 (6.7; 10.3) | 6.3 (5.6; 7.6) | 8.1 (6.4; 11.5) | 9.6 (8.4; 12.0) | 89 (6.6; 13.0) | P<0.001 | (I II III V) (I III IV V) |
| t(AP) [ms] | 0.31±0.06 | 0.29±0.07 | 0.27±0.07 | 0.27±0.04 | 0.27±0.07 | P = 0.054 | (I II III Iv V) |
abbreviations explained in methods.
categorical values are described in text.
a
Means ± S.D./Median (25%, 75%).
b
cluster that do not significantly differ are within one parentheses.