Fig. 6.

Differences in temporal sensitivity among facilitated combination-sensitive single units. A, Strongly facilitated neuron with best delay at 0 msec. Note the narrow temporal selectivity despite the use of long-duration signals (50 msec). This noise-responsive unit was stimulated with 10–23 and 35–45 kHz noise bands. B, Facilitated unit with very broad delay sensitivity. This noise-responsive unit was stimulated with 12–22 and 35–45 kHz noise bands. See Figure 3 for an explanation of figure conventions and symbols.