GROWTH DEVELOPMENT CHILD
DYSLEXIA
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Imaging research has demonstrated that the brains of people with dyslexia show different, less efficient, patterns of processing (including under and over activation) during tasks involving sounds in speech and letter sounds in words.
Detailed explanation-2: -Ordinary readers use left-brain systems, but dyslexic readers rely more on right brain areas. Researchers Judith Rumsey and Barry Horwitz at the National Institute of Mental Health used positron emission tomography (PET) to compare regional cerebral blood flow (rCBF) among dyslexic and nondyslexic men.
Detailed explanation-3: -The Brain with Dyslexia There is greater activation in the lower frontal area. Less activity in the Left Parietal-temporal lobe required for phonological processing is seen where identifying and manipulating individual sounds and the structure of words.
Detailed explanation-4: -In dyslexic readers, the anterior system is slightly overactivated compared to non-impaired readers; in contrast, the two posterior systems are underactivated. This pattern of underactivation in left posterior reading systems is referred to as the neural signature for dyslexia.