-- Robert Preidt
WEDNESDAY, June 29 (HealthDay News) -- Variations of a certain
gene affect the amount of time people spend looking at happy faces,
a finding that may help improve understanding of social behavior
and autism, according to researchers.
Looking at people's faces helps us read their emotions, but some
people are reluctant to gaze at others' faces. This is especially
true of people with autism.
The researchers analyzed DNA from 28 adult volunteers and tested
how long they looked at video clips of eyes and mouths of faces
with different emotions. They found that people with two types of
variations in the cannabinoid receptor (CNR1) gene spent more time
gazing at happy faces, but not at faces showing disgust.
The study is published online June 28 in the journal
"This is the first study to have shown that how much we gaze at faces is influenced by our genetic make-up. If replicated it has profound implications for our understanding of the drive to socialize, and in turn, the atypical use of gaze in autism," study co-leader Bhismadev Chakrabarti, of the University of Reading in England, said in a journal news release.
The U.S. National Institute of Neurological Disorders and Stroke
has more about
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