EEG-based time and spatial interpretation of activation areas for relaxation and words writing between poor and capable dyslexic children

Abstract

Symptoms of dyslexia such as difficulties with accurate and/or fluent word recognition, and/or poor spelling as well as decoding abilities, are easily misinterpreted as laziness and defiance amongst school children. Indeed, 37.9% of 699 school dropouts and failures are diagnosed as dyslexic. Currently, Screening for dyslexia relies heavily on therapists, whom are few and subjective, yet objective methods are still unavailable. EEG has long been a popular method to study the cognitive processes in human such as language processing and motor activity. However, its interpretation is limited to time and frequency domain, without visual information, which is still useful. Here, our research intends to illustrate an EEG-based time and spatial interpretation of activated brain areas for the poor and capable dyslexic during the state of relaxation and words writing, being the first attempt ever reported. From the 2D distribution of EEG spectral at the activation areas and its progress with time, it is observed that capable dyslexics are able to relax compared to poor dyslexics. During the state of words writing, neural activities are found higher on the right hemisphere than the left hemisphere of the capable dyslexics, which suggests a neurobiological compensation pathway in the right hemisphere, during reading and writing, which is not observed in the poor dyslexics.

The Mechanism of Cortico-Striato-Thalamo-Cortical Neurocircuitry in Response Inhibition and Emotional Responding in Attention Deficit Hyperactivity Disorder with Comorbid Disruptive Behavior Disorder

“…Compelling evidence for neuroplasticity is the fact that children's brains before maturity can establish bypass connections and compensate for impaired function through the differentiation and emergent responses of neuronal networks. For example, children with dyslexia can build extremely strong compensatory functions by constructing bypass connections, such that a new neurobiological compensatory pathway takes over language processing and motor activity instead of the primary language center [6]. Such processes hardly occur in adulthood, suggesting that less automatic processing of these structures is established in learning of a second language later in life [7].…”

Dyslexic Children: The Need for Parents Awareness

“…The reason why dyslexic children have difficulties in word recognition, poor spelling and decoding abilities is as a result of deficits in the phonological component of language that is connected to the cognitive abilities (Soriano-Ferrer & Echegaray-Bengoa, 2014). The writing difficulties are a result of high neural activities that are found on the right brain hemisphere compared to the left-brain hemisphere, which suggests the neurobiological compensation pathway in the right brain hemisphere during reading and writing (Mohamad et al, 2015).…”