The truth of Brocaʼs area, Wernickeʼs area and arcuate fasciculus

Abstract

  Despite Broca difined Brocaʼs area (Brodmann area-44, 45) as the seat of articulate speech, most aphasiologists defined Brocaʼs area as the language center. Whether Brocaʼs area has articulate function is still mystery. While Wernicke difined Wernickeʼs area (posteruior part of superior temporal lobe) as the seat of auditory image of language, many aphasiologists defined Wernickeʼs area as the seat of language comprehension. The true function of Wernickeʼs area and the seat of language comprehension are still controrversial. Scince the advent of DTI, many studies reported the long association fibers including arcuate fasciculus in the humann brain. Although DTI studies can provide evidence about majour fibers, current methodological limitations do not allow pricise deliniation of the origins and terminations of these fibers. So, the connectivity of arcuate fasciculus is still controversial.