| Asymmetry of protracted tongue: can it replace the Wada test? | |
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MedLine Citation:
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PMID: 20004524 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Some asymmetry of body parts (thumbs, cubital crease levels, popliteal crease levels, toes, breasts, gonads and facial structures) is commonly observed. And there is also neurobehavioral asymmetry such as handedness and language lateralization. Since right-handedness is closely associated with left-hemisphere dominance for language, it is known that handedness can be linked with language lateralization. But because cultural and social pressures influence handedness, handedness is able to shift. If so, handedness can't always reflect language lateralization. We can also detect another asymmetry in protracted tongue which is thought to be inherently unchangeable. Some midline deviation of fully protracted tongue is observed in every person. Protractor of the tongue, genioglossus muscle, is solely innervated by contralateral corticobulbar fibers from the inferior part of precentral gyrus. This part is closely related with language expressive area. Therefore, the midline deviation of tongue observed when it is fully protracted could be more related with language lateralization than handedness changeable to external pressures. |
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Authors:
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Dong-Gyun Han; Youn-Hee Lee |
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Publication Detail:
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Type: Journal Article Date: 2009-12-09 |
Journal Detail:
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Title: Medical hypotheses Volume: 74 ISSN: 1532-2777 ISO Abbreviation: Med. Hypotheses Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-07 Completed Date: 2010-08-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7505668 Medline TA: Med Hypotheses Country: United States |
Other Details:
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Languages: eng Pagination: 782-3 Citation Subset: IM |
Affiliation:
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Department of Neurology, DaeJeon HanKook Hospital, ChungCheongNam-Do, South Korea. tashihan@empal.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Functional Laterality
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physiology* Humans Language* Tongue / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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