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Regional Cerebral Blood Flow

Regional Cerebral Blood Flow. Anne Marie Katharina Daniel Mary. Overview. Subjects Goals and Study Methods Results. Subjects for the Test. Common factors. Deaf parents Right-handed No neuro disease. Goals and Study. similarities between signed and spoken language

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Regional Cerebral Blood Flow

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  1. Regional Cerebral Blood Flow Anne Marie Katharina Daniel Mary

  2. Overview • Subjects • Goals and Study • Methods • Results

  3. Subjects for the Test Common factors Deaf parents Right-handed No neuro disease

  4. Goals and Study • similarities between signed and spoken language • both seem to activate much the same regions in the brain • more occipital activation in sign language • sign language seems to involve the right hemisphere • study: compare sign language lateralization and localization between hearing and deaf children of deaf parents

  5. Methods • high resolution rCBF • Swedish novel was translated into Swedish sign language • presented by a deaf man signing • instruction: focus on story • retell story • Activation was compared during sign language and rest

  6. Results • both groups show a high bifrontal activation during rest • deaf group exhibited more activation in the parieto-occipital lobe • (highly significant) • hearing signers used more temporal areas • it seems that deafness and not the early learning of sign language that leads to enhanced right hemisphere activation • enhanced right hemisphere parieto-occipital activation in this group is an effect: • lack of auditory stimulation and of • early learning of a visual-spatial language

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