Fig. 6

Spatial tuning properties in the presence of a competing sound source. a Performance in the relative localisation task in broadband conditions (BBN) and in the presence of a competing sound source (CSS) for each ferret. b Example, raster in response to BBN stimuli and (c) CSS stimuli. d Spatial receptive fields of the same unit with centroids indicated by triangles. Spontaneous firing rates are indicated by the dotted lines. e Centroids, (f) ERRF widths and (g) modulation depth of units recorded in both BBN and CSS conditions. Mean ± s.e.m. (standard error of the mean) of units significantly spatially modulated in both conditions (black circles, N = 59) is shown by magenta cross-hairs. Open circles show individual units that changed significantly between the BBN and CSS conditions. Units significantly spatially modulated in a single condition are shown by the triangles (BBN, N = 11) and diamonds (CSS, N = 12). Grey squares were units not significantly spatially modulated in either condition (N = 10). h Distribution of best bin widths for all significantly spatially informative units (BBN, N = 153; CSS, N = 81). i Mean maximum MI ± s.e.m. of units from (g). The raw data are shown in coloured circles. j Comparison of MI in units recorded in BBN and CSS conditions. Black circles indicate units with significant MI in both conditions (N = 43), units with significant MI in a single condition are shown by triangles (BBN, N = 15) and diamonds (CSS, N = 18). Grey squares did not have significant MI in either condition (N = 16). Units that were only recorded in one condition are plotted along a separate axis (labelled unpaired, BBN sig. N = 95, not sig. = 66. CSS sig. = 20, not sig. = 16)