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. 2019 Feb 20;39(8):1374–1385. doi: 10.1523/JNEUROSCI.1806-18.2018

Figure 4.

Figure 4.

Increasing unisensory imbalance revealed a naïve neuron's native state in which congruent cross-modal cues are treated as competitors and yield response depression. Shown are responses of a naïve neuron to visual and auditory stimuli of different intensities that produced three levels of response imbalance. Top row, The impulse rasters (left) and summary histograms (right) show that the unisensory response magnitudes differed very little. Combining the visual and auditory stimuli produced a multisensory response product that was not significantly different from the best unisensory comparator response (auditory). Response magnitudes (impulses/trial): V = 6.1, A = 7.55, VA = 8.33; UI = 11%, ME = 10% (Mann–Whitney U test, p = 0.287). Second row, The responses to the visual and auditory stimuli differed greatly, and their combination produced a response 15% below the best unisensory response. V = 2.25, A = 7.15, VA = 6.1; UI = 52%, ME = −15% (Mann–Whitney U test, p = 0.071). Bottom row, The visual and auditory response differences were greatest here, as was the level of depression produced by their combination (−25%). V = 0.6, A = 6.55, VA = 4.9; UI = 83%, ME = −25% (t test, p = 0.014). *p = 0.0198. Conventions are the same as in Figure 2.