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A Correlation Between The Corpus Callosum And &Quot;Developmental Language Disorders&Quot;

3785 words - 15 pages

A correlation between the corpus callosum and "developmental language disorders"


Various types of language disorders affect a considerable amount of children academically and socially worldwide. This article focuses on developmental language disorders (DLD) caused by central auditory processing disorders (CAPD). A CAPD is defined as showing "difficulties discriminating, identifying and retaining sounds after the ears have "heard" the sounds." Both language and auditory are processed in an infinite number of nuclei throughout both hemispheres of the brain. Thus it has been hypothesized that abnormalities of the corpus callosum (CC) are correlated with deficiencies in auditory and language processes. This article reviews studies that have tried to prove this hypothesis. Due to the homogenous nature of either process, it is too complicated to try to identify a single cause of a single structure of the brain. Studies have yet to be found of having strong evidence that the CC correlates (or does not correlate) with DLDs and CAPDs.

Keywords: Developmental language disorder, central auditory processing disorder, dyslexia,

x-linked adrenoleukodystrophy, and corpus callosum

A correlation between the corpus callosum and "developmental language disorders"

Audition is a complex process that involves multiple areas of the brain. To be able to hear sound is just the beginning. Understanding speech and appreciating music requires an intensive and complex network of processes still yet to be understood. Many auditory processing deficits have been discovered with varying degrees of specificity and severities. A whole area of research has been dedicated to finding solutions to these auditory deficits that many children experience worldwide.

This paper focuses on developmental language disorders (DLD) that are believed to have underlying auditory processing deficits. I am using the general term "language disorder" because there is not enough information on any one particular disorder. Both language and audition are fairly new areas of research in the world of psychology, in addition to both being very complex processes. Thus this critic deals with auditory language comprehension of people with dyslexia, developmental learning disorders, reading disabilities, central auditory processing disorders, and x-linked adrenoleukodystrophy.

Auditory processing of language in a normal brain is thought to encompass the entire brain and that is a major reason why it so difficult to come to an agreement on how language is processed (Obler and Gjerlow, 1999). A very popular model though is the Personal Model proposed in the early 1980's. This model states that the central auditory nervous system is made up of many integrating neural systems. Large myelinated fibers, as well as smaller secondary fibers, interconnect these neural systems. As information is processed, the further (and higher) it travels into the brain the more...

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