TABLE 1.
FM directional preference at different FM sweep rates
| Sg Unit Directionality*
|
|||
|---|---|---|---|
| Sweep rate, kHz/s | 400 | 1000 | 3000 |
| Sweep duration, ms | 30 | 12 | 4 |
| Up | 12 (40) | 13 (52) | 16 (46) |
| Down | 7 (23) | 6 (24) | 5 (14) |
| Rate dependent | 2 (7) | 1 (4) | 4 (11) |
| Level dependent | 2 (7) | 1 (4) | 0 (0) |
| Bi-directional | 7 (23) | 4 (16) | 10 (29) |
| Total† | 30 (100) | 25 (100) | 35 (100) |
Values in parentheses are percentages. Sg, suprageniculate nucleus.
*
Responses at 50–60 dB SPL.
†
Total number of units tested at each sweep rate/duration.