Eye-contact detector found in the brain
—
Why does making direct eye contact with someone give you that feeling of a special connection? Perhaps because it excites newly discovered “eye cells” in the amygdala, the part of the brain that processes emotions and social interactions.
This new type of neuron was discovered in a Rhesus macaque. If humans have these neurons too, it may be that they are impaired in disorders such as autism and schizophrenia, which affect eye contact and social interactions.
Katalin Gothard, a neurophysiologist at the University of Arizona in Tucson, and her team placed seven electrodes in the amygdala of a Rhesus macaque. The electrodes, each one-tenth the thickness of a human hair, allowed them to record activity in individual neurons as the macaque watched a video featuring another macaque. All the while, the team also tracked the macaque’s gaze.
Out of the 151 neurons the researchers could distinguish, 23 fired only when the macaque was looking at the eyes of the monkey in the video. Of these neurons, which the team call “eye cells”, four fired more when the monkey in the video appeared to be gazing back at the laboratory macaque, as if the two animals were making eye contact.
(via newscientist)
