![]() ![]() When placed side by side, the pictures the monkey saw and the reconstructed images are "almost indistinguishable," Tsao says. But the approach is a bit like having one cell measure a variable like the distance between a person's eyes while another cell looks at skin texture, Tsao says.Īnd the system is so efficient that the team was able to accurately reconstruct the face a monkey was seeing using the signals from just 205 neurons. ![]() The actual coding involves some complicated math. "Each neuron was coding a different aspect of the face." "The cells were coding faces in a very simple way," says Doris Tsao, an author of the study and a professor of biology at Caltech. In macaque monkeys, which share humans' skill with faces, groups of specialized neurons in the brain called face cells appeared to divide up the task of assessing a face, a team at the California Institute of Technology reports Thursday in the journal Cell. Now scientists think they know how our brains do this. Most people have an uncanny ability to tell one face from another, even though the differences are extremely small. The images were then reconstructed using analyzing electrical activity from 205 neurons recorded while the monkey was viewing the faces. Eight different real faces were shown to a monkey. ![]()
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