Authors: Sarah Illingworth, Dorothy V.M. Bishop.
Publication: Brain and Language (Elsevier). Volume 111, Issue 1, Pages 61-65, 2009 | DOI: 10.1016/j.bandl.2009.05.002
Functional transcranial Doppler ultrasound (fTCD) is a relatively new and non-invasive technique that assesses cerebral lateralisation through measurements of blood flow velocity in the middle cerebral arteries. In this study fTCD was used to compare functional asymmetry during a word generation task between a group of 30 dyslexic adults and a group of 30 non-dyslexic individuals. In light of previous evidence of atypical laterality in dyslexia, a reduced leftward asymmetry was predicted and confirmed. We know from previous research that most people with atypical language lateralisation have normal language and literacy skills: nevertheless, our results confirm that language laterality is reduced in those with dyslexia. Theoretical explanations for this apparent conundrum are discussed.
Sarah Illingworth, Dorothy V.M. Bishop,
Atypical cerebral lateralisation in adults with compensated developmental dyslexia demonstrated using functional transcranial Doppler ultrasound,
Brain and Language,
Volume 111, Issue 1,