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Sunday, May 12 2013 6AM 33°F 9AM 32°F 5-Day Forecast
Autistic children see movement TWICE as quickly as those without condition
Experts found that the quicker the movement the faster the child saw it
Scientists believe the findings may provide clues to what causes condition
May explain why autistic people are overwhelmed by bright lights and noises
By RACHEL REILLY
PUBLISHED: 04:57 EST, 9 May 2013 | UPDATED: 07:24 EST, 9 May 2013
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Experts think that the hypersensitive brain of an autistic person may explain why sufferers can be overwhelmed by loud noises and bright lights
Children with autism see simple movement twice as quickly as other children their age, according to a new study.
Scientists think this this hypersensitivity to motion may provide clues to what causes the disorder.
The findings may explain why some people suffering with autism are sensitive to bright lights and loud noises.
‘We think of autism as a social disorder because children with this condition often struggle with social interactions, but what we sometimes neglect is that almost everything we know about the world comes from our senses.
'Abnormalities in how a person sees or hears can have a profound effect on social communication,' says Duje Tadin, one of the lead authors on the study and an assistant professor of brain and cognitive sciences at the University of Rochester.
Although previous studies have found that people with autism possess enhanced visual abilities with still images, this is the first research to discover a heightened awareness of motion.
The findings were reported in the Journal of Neuroscience by Tadin, co-lead author Jennifer Foss-Feig, a postdoctoral fellow at the Child Study Center at Yale University, and colleagues at Vanderbilt University.
In the study, 20 children with autism and 26 typically-developing children, all aged 8 to 17, viewed brief video clips of moving black and white bars.
They were asked to indicate which direction the bars were heading, right or left.
Each time a participant chose the correct direction, the next video clip became slightly shorter and so a little more difficult.
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When a child made a mistake, the next video became a bit longer and thus easier to see. In this way, the researchers were able to measure how quickly children with autism can perceive motion.
The researchers found that when the bars in the image were just barely visible, both groups of children performed identically. When the contrast or darkness of the bars was increased all participants in the study got better at perceiving the direction of movement.
‘But kids with autism, got much, much better—performing twice as well as their peers,’ says Foss-Feig.
The study found that autistic children were hypersensitive to movement
In fact, the worst performing participant with autism was roughly equal to the average of the participants without autism.
‘This dramatically enhanced ability to [see] motion is a hint that the brains of individuals with autism keep responding more and more as intensity increases.
The scientitst sais that while this could e seen as an advantange, in most circumstances the heightened sense could cause sensory overload.
Such hypersensitive perception is the neural signature for a brain that is unable to dampen its response to sensory information, note the authors.
This same increase in brain ‘excitability’ is also found in epilepsy, which is strongly linked to autism.
In fact, as many as one third of individuals with autism also have epilepsy. Normally, the brain puts the brakes on its responses to sound, taste, touch, and other stimuli when they become too intense.
The research builds on earlier findings that people with autism process visual stimuli differently.
For example, previous studies have shown that people with autism are better able to perceive basic patterns, are able to see simple line images more quickly, and are more focused on details than those without the condition.
In contrast, in more complex tasks, like facial recognition, these enhancements become impairments.
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Add your comments Comments (45)
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and mental illness does not exist.i have met lots of people with it in the mental health system
- ian poolton , Smethwick United Kingdom, 11/5/2013 17:43
Click to rate Rating 5 Report abuse
who knows.it could be the cause of epilepsy as well as ulcerative colitis/crohns and many other illnesses though it only gave me ulcerative colitis
- ian poolton , Smethwick United Kingdom, 11/5/2013 15:57
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complete nonsense.as ive written before autism is aspergillosis of the sinuses/asthma(breathing out one nostril/food getting stuck in throat.it gave me ulcerative colitis aged 17(im 46 now)and am using a sinus rinse
- ian poolton , Smethwick United Kingdom, 11/5/2013 15:41
Click to rate Rating 12 Report abuse
At last!!! I've struggled for years to get schools etc to recognise that my sons SENSORY problems are far more disabling to him than the more recognised "social impairment" they always want to focus on. He can't even think about social interaction if he can't function at all within his environment.
- Dolly , walsall, 11/5/2013 09:12
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Your comments: google default mode network This is already well known in neurology.
- oliverthered , Southport, 10/5/2013 19:45
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V interesting. I wonder if this could be part of the fear/flight response, a state of permanent heightened anxiety which sharpens the senses, and could link in somehow to the different levels of cortisol found in this group. My Asperger's child says: "I feel like a prey animal." I would think rabbits, deer, etc have a very heightened sense of any flicker of movement around them. I have read several small pieces of research which found a heightened heart beat amongst ASD children compared to controls.
- SandraB , London, 10/5/2013 09:58
Click to rate Rating 15 Report abuse
This is nothing new. It was recognized in the seventies, particularly by research at the University of Arizona, that most autistic children (under the old criteria) were having sensory processing problems. Some had visual issues, some auditory issues, some tactile issues and some olfactory (scent) issues. Some kids couldn't handle changes in their environments because they couldn't justify (balance) the old knowledge of the space with its present configuration (such as rearranging the furniture or taking a different route to school or even changing dinner time.) Kids developed multiple coping strategies (rocking, putting their hands under running water, spinning objects, watch TV test patterns.) They became uncommunicative because they couldn't prioritize input. The newest research shows that there is a genetic component to some cases of autism and some identifiable brain issues (via PET scanning) for others.
- pat , penna, 10/5/2013 07:16
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people with dyspraxia, aka non-verbal learning disorder in the US, also frequently have this problem. I also have this problem, it makes it hard for me to catch a ball. All i see is a blur.
- lolo , portland oregon, 10/5/2013 06:06
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Are all of u that ignorant??? I am a mom of a beautiful 2 year old girl who was diagnosed at 1 with autism. My self and my husband tried for 6 years to have her and are wonderful patents and it breaks our hearts every second of every day to see her struggle. A good " smack" as one of u say can cure them! I pray none of you are ever in our shoes.
- Booandbug , Staten island, United States, 10/5/2013 04:05
Click to rate Rating 35 Report abuse
"Not sure that this article will cut much ice on here - as ninety per cent of DM readers know (judging from the shocking and ignorant comments following a recent article), there is no such thing as autism and it's a result of bad parenting. - The Futurist, Chelmsford, 9/5/2013 11:32" No. Your ignorance is a result of bad parenting - Laura , Sydney, Australia, 09/5/2013 22:26 Laura if you re-read The Futurist's comments, you will note that he/she was referring to shocking and ignorant comments made by some readers who assumed that it was bad parenting. I am not under the impression that he/she thinks that it is and any of us who has the experience at close range would know that it certainly is not!
- Baffled , Newcastle, United Kingdom, 09/5/2013 23:51
Click to rate Rating 18 Report abuse
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