Dyslexia is an SLD that encompasses a variety of symptoms.
Current research has been limited in its understanding of this disorder due to inconsistent terminology and changing definitions, and therefore, has not supported one mainstream theory.
Possible hypotheses suggest a genetic predisposition (heritability), neurochemical differences, and morphological anomalies (i.e. corpus callosum, magnocellular pathway, hemisphere symmetry, etc).
These causes may contain only a minor common thread. Thus, an analysis of case studies for common patterns and a compilation of these projects is still in progress, and so our understanding the biological evidence for SLDs is just beginning.
To read on (and rock on) click here: