1. Headline
  1. Headline
By Robert Bazell Chief science and health correspondent
NBC News
updated 2/23/2005 1:18:41 PM ET 2005-02-23T18:18:41

Kahlil Russell seems like a normal, charming 7-year-old, but he has autism. He speaks only a few words and can quickly drift away to where no one — not even his parents — can reach him.  

  1. More from TODAY.com
    1. Teens affected by terrorism find healing, peace at inspiring camp

      Thanks to a very special summer camp, teens who have lost a loved one due to violent extremism or war have a place to find...

    2. Oh. My. Geep. Meet the half goat, half sheep who is all cuteness
    3. 'Hugging my children closer': Reporter home after covering MH17 crash
    4. Chris Pratt is finally a leading man: 5 reasons we're rooting for him
    5. Aloe Blacc reveals inspiration behind 'Wake Me Up'

"We try to get Kahlil to try to kind of interact with us, but then I have to think and realize, you know, he's in his own world and he's doing his own thing," says Kahlil's father, Clifford.

Kahlil attends a school for children with the disorder run by the Help Group in Sherman Oaks, Calif. At the school, one can see the range of disabilities the brain disorder can cause — from mild to severe.

What goes on in the brains of these children?

"They see everything. They hear everything. They feel everything," says Dr. Michael Merzenich at the University of California at San Francisco. "But they can't tell anybody. They can't get it out."

Most troubling, experts say, is the alarming increase in the number of cases. A few decades ago, autism was almost unheard of. Now it seems to be exploding. In the past decade the number of school-age children getting treatment skyrocketed 600 percent.

"Parents are going to be needing more and more of these types of facilities with the increasing numbers of kids being identified," says Dr. Barbara Firestone, president of the Help Group.

Why the increase?

Dr. Daniel Geschwind at the University of California Los Angeles says one reason is that doctors are diagnosing it more often.

"People are less reluctant to diagnosis autism, or high-functioning autism, in children. And so, some of it is clearly a diagnostic issue," says Geschwind.

But that's not all. Research so far has cleared childhood vaccines, but there could be other environmental factors.

"This doesn't necessarily mean toxicants," says Geschwind. "It can be anything in the environment that we're exposed to."

To try to find the cause, researchers are scanning the brains of children and adults with autism and looking for genetic factors. They hope that a better understanding of this frightening disorder will help reveal the reasons behind the dramatic increase.

© 2013 NBCNews.com  Reprints

Discuss:

Discussion comments

,

Most active discussions

  1. votes comments
  2. votes comments
  3. votes comments
  4. votes comments

More on TODAY.com

  1. Keir Simmons Via Instagram

    'Hugging my children closer': Reporter home after covering MH17 crash

    8/1/2014 8:33:03 PM +00:00 2014-08-01T20:33:03
  1. Priscilla Motola

    Oh. My. Geep. Meet the half goat, half sheep who is all cuteness

    8/1/2014 9:05:08 PM +00:00 2014-08-01T21:05:08
  1. Samantha Okazaki / TODAY

    Teens affected by terrorism find healing, peace at inspiring camp

    8/1/2014 9:32:07 PM +00:00 2014-08-01T21:32:07
  1. US scrambles to retrieve Ebola-infected Americans

    Health officials are trying to bring two American patients infected with Ebola virus back from West Africa for treatment.The State Department said it was helping organize the evacuations over the “coming days.”

    8/1/2014 3:47:06 PM +00:00 2014-08-01T15:47:06
  1. Matt York / AP

    Mansion or shack? That's the million-dollar question

    8/1/2014 6:47:36 PM +00:00 2014-08-01T18:47:36