Fig. 4.

Trials with higher spontaneous baseline activity in the mixed condition do not mimic the effects of block statistics. A: normalized responses of the population of 82 face view-tuned IT neurons to 20 views of face stimuli, ordered relative to optimal viewing angle, for the high-baseline trials (red) and the low-baseline trials (blue) of the mixed condition. Neurons do not respond more strongly to suboptimal viewing angles on trials with high-baseline activity. B: histogram of the changes in the single-neuron breadth of tuning for face views (high baseline − low baseline), for all 131 face-responsive neurons. A negative mean indicates that neurons are responding to a smaller fraction of the face stimuli in the high-baseline trials, opposite the effect seen during the face condition. C: histogram of the changes in the breadth of population tuning (high baseline − low baseline) for each of the 20 views of face stimuli. A negative mean indicates that each stimulus is activating a smaller fraction of the neuronal population in the high-baseline trials, again opposite the effect seen during the face condition.