Brain scans spot early signs of dyslexia
Instead of waiting for a child to experience reading delays, scientists now say they can identify the reading problem even before children start school, long before they become labeled as poor students and begin to lose confidence in themselves.
Although typically diagnosed during the second or third grade of school - around age 7 or 8 - a team from Children’s Hospital Boston said they could see signs of the disease on brain scans in children as early as 4 and 5, a time when studies show children are best able to respond to interventions.
“We call it the dyslexia paradox,” said Nadine Gaab of the Laboratories of Cognitive Neuroscience at Children’s, whose study was published in Proceedings of the National Academy of Sciences.
Gaab said most children are not diagnosed until third grade, but interventions work best in younger children, hopefully before they begin to learn to read.
“Often, by the time they get a diagnosis, they usually have experienced three years of peers telling them they are stupid, parents telling them they are lazy. We know they have reduced self esteem. They are really struggling,” Gaab said in a telephone interview.
Her study builds on an emerging understanding of dyslexia as a problem with recognizing and manipulating the individual sounds that form language, which is known as phonological processing.
Dyslexia Signs
Although the signs of dyslexia will vary some according to age, here are several of the early signs of dyslexia which you are likely to notice if you are looking for them:
Difficulty tying shoelaces (or other fine motor activity)
Trouble remembering the days of the week or the months of the year in order (sequential struggles)
Stuttering
Pronouncing words incorrectly
(or using them in odd places in a sentence - i.e., the wrong part of speech)
Ignoring or misunderstanding directions
Difficulty remembering more than one instruction at a time
For example, if you ask your child to “go to the bathroom closet, get a washcloth and wipe off the counter” - the likelihood of completing the tasks will be highly unlikely)
Organizational difficulties
Communication struggles
(Includes finding the right word or making oneself understood; these children may be easily frustrated with frequent meltdowns)
In order to read, children must map the sounds of spoken language onto specific letters that make up words. Children with dyslexia struggle with this mapping process.
“The beauty is spoken language can present before written language so people can look for symptoms,” said Dr. Sally Shaywitz, a director of the Center for Dyslexia and Creativity at Yale University.
Signs of early dyslexia might include difficulty with rhyming, mispronouncing words or confusing similar-sounding words.
Early Signs of Dyslexia
Because dyslexia is primarily associated with difficulty in learning to read, it cannot be reliably diagnosed until your child is the age at which reading typically begins. Although most children are ready to begin to read at about age six, individual development is variable. It is normal for some children to pick up basic reading skills as early as age four, and it is also normal for many children to be delayed in learning to read until age seven or eight.
Symptoms of Dyslexia
Identifying signs of dyslexia can be a difficult task. Many of the problems that are tell-tale symptoms of dyslexia in older children are part of normal development in a three-year-old. In order to assess whether your very young child could have dyslexia, it’s best to look at her overall learning pattern.
The following are some common characteristics that may be signs of dyslexia in preschool-age children:
Jumbling sounds of words in speech, such as saying “pasgetti” for “spaghetti” or “mawn lower” for “lawn mower.”
Confusing words signifying direction in space or time, such as “up” and “down,” “in” and “out,” “yesterday” and “tomorrow.”
Forgetting or confusing the word for known objects, such as “table” or “chair.”
Delayed speech development.
Unusual speech patterns, such as frequent hesitations or stammering.
Difficulty with behavior or learning.
Difficulty remembering and following directions.
Extremely low tolerance for frustration.
Difficulty getting dressed, buttoning clothes, and putting shoes on the correct feet.
Excessive tripping, bumping into things, and falling over.
Difficulty with catching, kicking, or throwing a ball; with hopping and/or skipping.
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by Abigail Marshall
“Those are all very early symptoms,” Shaywitz said.
Dyslexia affects roughly 5 percent to 17 percent of all children and up to 1 in 2 children with a family history of the disorder will struggle with reading, have poor spelling and experience difficulty decoding words.
In her study, Gaab and colleagues scanned the brains of 36 preschool children while they did a number of tasks, such as trying to decide if two words start with the same sound.
They found that during these tasks, children who had a family history of dyslexia had less brain activity in certain regions of the brain than did children of similar ages, intelligence and socioeconomic status.
Older children and adults with dyslexia have dysfunction in these same areas of the brain, which include the junctions between the occipital and temporal lobes and the temporal and parietal lobes in the back of the brain.
Gaab said the study shows that when children predisposed to dyslexia did these tasks, their brains did not use the area typically used for processing this information. This problem occurred even before the children started learning to read.
“The important point of this paper is it shows the need to look for signs of dyslexia earlier,” said April Benasich, director of the Carter Center for Neurocognitive Research at Rutgers, the State University of New Jersey, who was not part of the study.
Benasich studies language processing in even younger children - babies who have a family history of learning disorders.
“There is evidence to suggest that what is thought to be reading failure is there before the kids fail,” she said.
Gaab said her study is too small to form the basis of any test for dyslexia but her team has just won a grant from the National Institutes of Health to do a larger study.
Ultimately, she hopes parents will be able to go to their pediatrician and ask for their child to be assessed.
“Families often know that their child has dyslexia as early as kindergarten, but they can’t get interventions at their schools,” she said in a statement.
“If we can show that we can identify these kids early, schools may be encouraged to develop programs,” she said.
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(Reuters)