Neurological Basis of Dyslexia

Neurological Basis of Dyslexia

Introduction

Dyslexia, deficit in learning to read, is by far the most common form, probably because reading is among the cognitive functions that can be altered specifically, one that sounds most clearly in the short and long term on academic skills. The inability to conceive of spoken language as consisting of separate sounds from each other and successively pronounced would be the main cause of the inability of the dyslexic child to learn naturally and almost spontaneously (as in the majority of students in the first year of apprenticeship) correspondences between phonemes (sounds) and graphemes (letters) (Borstrom, 1997).

Dyslexia is a disorder of learning to read, linked to the difficulty in identifying letters, the syllables or words that occur in the absence of any deficit in visual, auditory, or intellectual and despite an enrolment normal except in certain cases where the insertion in a classroom is difficult. Dyslexia often causes difficulties in writing (dysgraphia). Sometimes it is the question of acquired dyslexia (or alexia) to characterize the reading deficits, that occur following a brain injury, while dyslexia, in the usual sense, it is quite congenital, without evidence can be in the past of the individual who has it any pathological event able to explain the disorder.

Dyslexia has been recognized as a developmental disorder of scholastic skills by the World Health Organization in 1991 estimated that it button 8 to 12% of the population, including 5 to 15% of children. Its diagnosis is established by a multidisciplinary assessment conducted by professional medical and actors from various allied health professionals, who can balance out other causes and characterize the dyslexia for him, adapt best remediation. For now, there is no Para clinical examination to assist in diagnosis, but it seems that some medical imaging methods are capable of identifying clearing mechanisms that are effective in overcoming the disorder.

In some cases, this disorder is usually resulting in clumsiness and inability, to perform delicate movements, sometimes only detectable at events, in other cases it is accompanied by more or less exclusive of an obvious difficulty in graphic action, which are called dysgraphia happy. The curious combination of a pure motor disorder in reading disorder that characterizes dyslexia has recently given rise to an attractive path physiological hypothesis. Tracking earliest signs of dyscalculia should enable earlier treatment and thus more effectively this form of learning disability, willingly associated with dyslexia (Dawes & Bishop, 2009).

Neurological aspect of Dyslexia

Norman Geschwind was a key figure in neurology clinical research of the second half of the twentieth century. Among his many contributions to the discipline neurological, his ideas about dyslexia were probably the most innovative, and consequently the most contested. Geschwind, a clinician he was, had left ordinary clinical findings to develop a model that triggered an impressive array of scientific work, only some of which went in the direction of its assumptions. First, Geschwind noticed that dyslexics often suffer from various allergic diseases (like asthma, eczema, etc) and were more often than you ...