Journal of Language, Linguistics and Literature
Articles Information
Journal of Language, Linguistics and Literature, Vol.1, No.2, Apr. 2015, Pub. Date: Mar. 21, 2015
Comparison Between Speech and Non-Speech Stimulus in Dyslexia: A MMN Study
Pages: 7-11 Views: 2497 Downloads: 950
Authors
[01] Mehdi Akbari, Cellular and Molecular Research Centre (CMRC), Iran University of Medical Science (IUMS), Tehran, Iran.
[02] Mohammad Taghi Joghataei, Cellular and Molecular Research Centre (CMRC), Iran University of Medical Science (IUMS), Tehran, Iran.
[03] Akram Pourbakhat, Department of Audiology, Iran University of Medical Science (IUMS), Tehran, Iran.
[04] Mohammad Sadegh Jenabi, Department of Speech Therapy, Iran University of Medical Science (IUMS), Tehran, Iran.
Abstract
Objective: dyslexia is a neurological problem, therefore, auditory mismatch negativity was investigated in dyslexic children. Methods: 52 children with dyslexia (30 male, 22 female) and 52 controls were studied using speech and tonal stimuli. Intensity was used at 65 dB nH. The study focused on latency, amplitude and topographic distribution of MMN in both groups. Results: at the present study with speech stimulus, larger latency and smaller amplitude were found in dyslexic children when compared with controls. Topographic distribution showed larger MMN in right hemisphere than left side in dyslexic children. With tone stimulus we found no differences between two groups. Conclusions: these results provide evidence for MMN and its function in central auditory processing. The MMN using speech can be used to concentrate on the relationship between central auditory processing and learning deficits in children with dyslexia.
Keywords
MMN, Dyslexia, Auditory System
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