Police officers and other first responders attend a 2012 autism information training session in Wrentham, Mass. Several cities are working to reduce the risk of miscommunication between police officers and people with autism. Elise Amendola/AP hide caption

itoggle caption Elise Amendola/AP

Images of the developing fetal brain show connections among brain regions. Allen Institute for Brain Science; Bruce Fischl, Martinos Center for Biomedical Imaging, Massachusetts General Hospital hide caption

itoggle caption Allen Institute for Brain Science; Bruce Fischl, Martinos Center for Biomedical Imaging, Massachusetts General Hospital

Researchers say intervention in early childhood may help the developing brain compensate by rewiring to work around the trouble spots. iStockphoto hide caption

itoggle caption iStockphoto

Clinical specialist Catey Funaiock took notes while observing a 5-year-old boy at the Marcus Autism Center, part of Children's Healthcare of Atlanta, in September. David Goldman/AP hide caption

itoggle caption David Goldman/AP

A newly discovered neural circuit in the brain of the common fruit fly seems to serve as a sort of "volume control," turning up and down the perception of sound and light. Nicholas Monu/iStockphoto hide caption

itoggle caption Nicholas Monu/iStockphoto

The American Academy of Pediatrics recommends that children have no more than two hours a day of "screen time." Marilyn Nieves/iStockphoto.com hide caption

itoggle caption Marilyn Nieves/iStockphoto.com

Instructional assistant Jessica Reeder touches her nose to get Jacob Day, 3, who has autism, to focus his attention on her during a therapy session in April 2007. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Amelia Schabel, 23, works with art director Andrew LaBounty at the nonPareil Institute in Plano, Texas. Courtesy of nonPareil hide caption

itoggle caption Courtesy of nonPareil

A new study from the Centers for Disease Control and Prevention finds no link between the number of vaccinations a young child receives and the risk of developing autism spectrum disorders. Jeff J. Mitchell/Getty Images hide caption

itoggle caption Jeff J. Mitchell/Getty Images

A guinea pig does its part for science and human relations by sitting on the lap of an autistic child. Erin Burnett/Courtesy of Maggie O'Haire hide caption

itoggle caption Erin Burnett/Courtesy of Maggie O'Haire

Despite public health campaigns urging women in the U.S. to take folic acid, many are still not taking the supplements when they become pregnant. iStockphoto.com hide caption

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Unrefrigerated brains in preserving solution are stacked high on shelves at the Harvard Brain Tissue Resource Center at McLean Hospital. Olin College of Engineering/Flickr hide caption

itoggle caption Olin College of Engineering/Flickr