K. Jariabkova et al., IMMUNE DISORDERS AND HANDEDNESS IN DYSLEXIC BOYS AND THEIR RELATIVES, Scandinavian journal of psychology, 36(4), 1995, pp. 355-362
Thirty dyslexic and 30 control boys aged 7-11 years were compared for
frequency of immune disorders and handedness as well as for family his
tory of immune disorders and learning disabilities (dyslexia and stutt
ering). They were also compared for neurological status and for histor
y of speech and language difficulties. There were no significant diffe
rences between the two groups in the frequency of immune disorders and
in handedness. The results showed significantly more dyslexic boys wi
th soft neurological signs and signs of speech and language disorders.
The frequency of dyslexia was significantly higher. in the relatives
of the dyslexic boys. Also significantly more mothers of the dyslexic
boys reported difficulties during pregnancy and complications at deliv
ery. The results are discussed in terms of Geschwind's hypothesis and
neuromaturational delay as possible determinants of developmental dysl
exia.