It is shown that the fraction of information carried by the lowfiring rates of a cell was large-much larger than that carried bythe high firing rates. This was the case for responsesbelow the average response as well as above. It is shown that the information available about anyone stimulus depended on how different (for example, how manystandard deviations) the response to that stimulus was from theaverage response to all stimuli. Thus the representation was not local, forin a local representation almost all the information available canbe obtained when the single stimulus to which the neuron respondsbest is shown. It was found that for the majority of the neurons significantamounts of information were reflected about which of several of the23 faces had been seen. The stimuli included 23 facesand 42 nonface images of real-world scenes, so that the function ofthis brain region could be analyzed when it was processing relativelynatural scenes. ![]() ![]() The population of neuronsanalyzed responded primarily to faces. ![]() To analyze the information provided about individual visual stimuliin the responses of single neurons in the primate temporal lobevisual cortex, neuronal responses to a set of 65 visual stimuli wererecorded in macaques performing a visual fixation task and analyzedusing information theoretical measures.
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