Contribution of writing to reading: Dissociation between cognitive and motor process in the left dorsal premotor cortex

Human Brain Mapping
Chotiga PattamadilokMireille Bonnard

Abstract

Functional brain imaging studies reported activation of the left dorsal premotor cortex (PMd), that is, a main area in the writing network, in reading tasks. However, it remains unclear whether this area is causally relevant for written stimulus recognition or its activation simply results from a passive coactivation of reading and writing networks. Here, we used chronometric paired-pulse transcranial magnetic stimulation (TMS) to address this issue by disrupting the activity of the PMd, the so-called Exner's area, while participants performed a lexical decision task. Both words and pseudowords were presented in printed and handwritten characters. The latter was assumed to be closely associated with motor representations of handwriting gestures. We found that TMS over the PMd in relatively early time-windows, i.e., between 60 and 160 ms after the stimulus onset, increased reaction times to pseudoword without affecting word recognition. Interestingly, this result pattern was found for both printed and handwritten characters, that is, regardless of whether the characters evoked motor representations of writing actions. Our result showed that under some circumstances the activation of the PMd does not simply result from passive as...Continue Reading

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Citations

Sep 22, 2018·Journal of Cognitive Neuroscience·Sophia Vinci-BooherKarin H James
Oct 7, 2019·Brain and Language·Marieke LongcampMarc Sato
Jun 30, 2021·Psychological Science·Robert W Wiley, Brenda Rapp
Jun 25, 2021·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Sabrina Turker, Gesa Hartwigsen

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