Certain neurons in the medial temporal lobe (MTL) respond to different images and even the name of a given individual. Here, the authors assessed MTL neuron responses in a face adaptation task. Participants were shown the face of one of two well-known people (who were chosen because the authors could find MTL neurons that selectively responded to their images) and were then asked who they saw in a merge of the two faces; most reported seeing the other individual. Single MTL neurons also responded strongly to the merge when the identity of the face chosen by participant matched the neuron's supposed face selectiveness. This suggests that MTL neurons signal perceptual decisions rather than visual features.
References
Quian Quiroga, R. et al. Single-cell responses to face adaptation in the human medial temporal lobe. Neuron http://dx.doi.org/10.1016/j.neuron.2014.09.006 (2014)
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Yates, D. A decisive response. Nat Rev Neurosci 15, 701 (2014). https://doi.org/10.1038/nrn3853
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DOI: https://doi.org/10.1038/nrn3853