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Reading in Devanagari: Insights from functional neuroimaging.

Nandini Chatterjee Singh¹, Chaitra Rao¹

¹National Brain Research Centre, NH-8, Nainwal Mode, Manesar, Gurgaon, Haryana, India.

The Indian Journal of Radiology & Imaging

|May 23, 2014

Summary

This summary is machine-generated.

Neuroimaging reveals a bilateral brain network for reading Hindi/Devanagari script, unlike the left-lateralized networks for alphabetic scripts. This suggests increased visual processing demands due to the script's complex structure.

Keywords:

Alphasyllabary Devanagari functional magnetic resonance imaging reading

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Area of Science:

Neuroscience
Cognitive Science
Linguistics

Background:

Visual word recognition research has primarily focused on alphabetic scripts.
The neural basis of reading alphasyllabic scripts like Hindi/Devanagari remains underexplored.
Hindi/Devanagari presents unique visuospatial challenges due to its complex symbol arrangement.

Purpose of the Study:

To investigate the neural network underlying visual word recognition in Hindi/Devanagari using functional magnetic resonance imaging (fMRI).
To compare the reading network of Hindi/Devanagari with those of alphabetic scripts.

Main Methods:

Functional MRI (fMRI) was employed on 16 healthy native Hindi/Devanagari readers.
Participants performed a word naming task involving linear and nonlinear Devanagari words of varying frequencies.
fMRI data were acquired using a 3T scanner with a T2*-weighted EPI sequence.

Main Results:

Robust activation was observed in bilateral occipito-temporal, inferior frontal, and precentral regions, as well as cerebellar hemispheres.
Left inferior parietal and right superior temporal cortices also showed activation.
Differences in activation patterns were noted between linear and nonlinear word reading, particularly in right temporal areas and the cerebellum.

Conclusions:

Reading Devanagari engages a bilateral neural network, contrasting with the predominantly left-lateralized network for alphabetic scripts.
The complex visuospatial structure of Devanagari likely necessitates enhanced visual processing, contributing to the observed bilateral activation.
This study provides novel insights into the neurobiology of reading non-alphabetic scripts.