Clinical Correlation

The Aphasias and Other Disorders of Language
  • Gregory Cooper
  • Gerald Eichhorn
  • Robert Rodnitzky

Language is the mechanism by which communication is achieved through the use of specific sounds or symbols. In the clinical realm, it is extremely important to differentiate this process from that of speech, the coordinated motor mechanism that allows the utterance of sound. Either language or speech can be abnormal with total preservation of the other, although in some clinical circumstances, both are involved simultaneously. Conceptual abnormalities of production or understanding of speech or language are referred to as aphasia, and mechanical abnormalities in the motor production of speech are known as dysarthria or anarthria.

Apahsic Disorders Are Usually Caused by Lesions of The Left Hemisphere

Language dominance is located in the left hemisphere in approximately 95% of right-handed persons and in approximately 66% of those people who are left-handed. Because most of the population is right-handed, a useful clinical principle is that the left hemisphere must be considered dominant...


Left Hemisphere Occipital Lobe Dominant Hemisphere Arcuate Fasciculus Language Dominance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Selected Readings

  1. Damasio AR. Aphasia. N Engl J Med 1992;326(8):531–539.PubMedCrossRefGoogle Scholar
  2. Hillis AE. Aphasia: Progress in the last quarter of a century 2007;69(2):200–213.Google Scholar
  3. Rumsey JM. The biology of developmental dyslexia. JAMA 1992;268(77):912–915.PubMedCrossRefGoogle Scholar

Copyright information

© Humana Press, Totowa, NJ 2008

Authors and Affiliations

  • Gregory Cooper
    • 1
  • Gerald Eichhorn
    • 2
  • Robert Rodnitzky
    • 3
  1. 1.Sanders-Brown Center on Aging, The University of Kentucky, Lexington, KY, USAThe Lexington ClinicLexingtonUSA
  2. 2.The Lexington ClinicLexingtonUSA
  3. 3.Department Head of NeurologyUniversity of Iowa Hospitals and ClinicsIowa CityUSA

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