Ming-Ching Wang, Zoe Marshman, Wei-Han Chen, Wen-Yu Shih
A qualitative study of barriers and facilitators to the implementation of a pilot school-based, toothbrushing programme
BMC oral health
rightear advantage rea recalling dichotically presented auditoryverbal stimuli traditionally linked dominance left cerebral hemisphere speech processing early studies patients callosotomy additionally found removal corpus callosum leads complete extinction left ear consequently today widely used models explain rea assume central role callosal axons recalling leftear stimulus dichotic listening however later dichoticlistening studies callosotomy patients challenge interpretation many patients appear able recall leftear stimuli well chance level albeit reduced accuracy aim present systematic review identify possible experimental patient variables explain inconsistences found regarding effect splitbrain surgery dichotic listening purpose systematic literature search conducted databases pubmed web knowledge ebschost ovid identify empirical studies patients surgical section corpus callosum complete partial used verbal dichoticlistening paradigm search yielded ks 32 publications reporting patient data either case group level data analysed comparing caselevel incidence leftear suppression leftear extinction rightear enhancement narratively statistically considering possible moderator variables ia extent callosal surgery stimulus material response format selective attention main finding increased incidence leftear suppression odds ratio 747 ci95 121 8349 exact p 02 rightear enhancement odds ratio 2161 ci95 440 15411 p 01 rhyming compared nonrhyming stimuli used also increase leftear reports apparent response right hemisphere allowed ie response left hand present review limited overall small number cases lack appropriate control sample original studies findings nevertheless suggest adjustment classical dichoticlistening models incorporating righthemispheric processing abilities well perceptual competition left rightear stimuli attention