Fig. 5.

Responses to pure tones as a function of stimulus level for 4 simultaneously recorded single units. A: dot raster displays for each of the 4 units in response to a pure tone (1 kHz) of varying level. Stimulus is on from 50 to 300 ms as indicated below each raster plot. B: rate–level curves corresponding to the dot rasters in A. All the curves have been normalized to a maximum rate of 1. Filled symbols below the x-axis indicate the thresholds for each unit. Range of thresholds is <10 dB. These 4 units exhibit a mix of nonmonotonic and monotonic rate–level dependencies.