Neuroimaging reveals dual routes to reading in simultaneous proficient readers of two orthographies

Das, T. and Padakannaya, P. and Pugh, K. R. and Singh, N. C. (2011) Neuroimaging reveals dual routes to reading in simultaneous proficient readers of two orthographies. NEUROIMAGE, 54 (2). pp. 1476-1487.

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Abstract

Orthographic differences across languages impose differential weighting on distinct component processes, and consequently on different pathways during word-reading tasks. Readers of transparent orthographies such as Italian and Hindi are thought to rely on spelling-to-sound assembly and show increased activation in phonologically tuned areas along the dorsal pathway, whereas reading an opaque orthography such as English is thought to rely more on lexically mediated processing associated with increased activation of semantically tuned regions along the ventral pathway. To test if biliterate Hindi/English readers exhibit orthography-specific reading pathways, we used behavioural measures and functional neuroimaging. Reaction times and activation patterns of monolingual English and Hindi readers were compared to two groups of adult biliterates; 14 simultaneous readers who learnt to read both languages at age 5 and 10 sequential readers who learnt Hindi at 5 and English at 10. Simultaneous, but not sequential readers demonstrated relative activation differences of dorsal and ventral areas in the two languages. Similar to native counterparts, simultaneous readers preferentially activated the left inferior temporal gyms for English and left inferior parietal lobule (L-IPL) for Hindi, whereas, sequential readers showed higher activation along the L-IPL for reading both languages. We suggest that early simultaneous exposure to reading distinct orthographies results in orthography-specific plasticity that persists through adulthood. (C) 2010 Elsevier Inc. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Biliteracy; Reading; Simultaneous; Sequential; Orthography
Subjects:	A Arts and Humanities > Psychology
Divisions:	Department of > Psychology
Depositing User:	Users 23 not found.
Date Deposited:	14 Jun 2019 06:12
Last Modified:	14 Jun 2019 06:12
URI:	http://eprints.uni-mysore.ac.in/id/eprint/2585

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