The Teaching Point

Although language dominance in sign language patients is typically ipsilateral to that for reading, it is possible that sign language and reading functions can have crossed dominance. This is particularly true for patients with deafness arising from early injury and cortical reorganization should be suspected in patients with injury during the language formative period.






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From the manuscript

Opposite cerebral dominance for reading and sign language

Free full text article: Opposite cerebral dominance for reading and sign language

Abstract
We present a case of right hemispheric dominance for sign language but left hemispheric dominance for reading, in a left-handed deaf patient with epilepsy and left mesial temporal sclerosis. Atypical language laterality for ASL was determined by preoperative fMRI, and congruent with ASL modified WADA testing. We conclude that reading and sign language can have crossed dominance and preoperative fMRI evaluation of deaf patients should include both reading and sign language evaluations.






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