A speechreading expert. The case of MM.

• The present case study of MM, who acquired both sign languageand spoken language in her early preschool years—and thenreached the normal milestones of development in each language—revealedthat her speechreading expertise is associated with cognitivefunctions such as high working memory capacity and phonologicalskills. Her cognitive profile is in accord with previous casestudies of extremely good speechreading skill. MM's enhancedright prefrontal/frontal cerebral blood flow activation duringspeechreading seems to be indicative of efficient visual scanning,but it is also possibly due to her strategy for phonologicaldecoding of visual speech.

Nyckelord

speechreading

cognition

working memory

phonology

lipreading

MEDICINE

MEDICIN

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