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Partial agenesis of the corpus callosum in spina bifida meningomyelocele and potential compensatory mechanisms.

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Title: Partial agenesis of the corpus callosum in spina bifida meningomyelocele and potential compensatory mechanisms.
Authors: Hannay, H. Julia (AUTHOR), Dennis, Maureen (AUTHOR), Kramer, Larry (AUTHOR), Blaser, Susan (AUTHOR), Fletcher, JackM. (AUTHOR)
Source: Journal of Clinical & Experimental Neuropsychology. Feb2009, Vol. 31 Issue 2, p180-194. 15p. 2 Black and White Photographs, 4 Charts, 1 Graph.
Subjects: Myelomeningocele, Neural tube defects, Magnetic resonance imaging, Anterior commissure, Brain anatomy
Abstract: After a review of Arthur Benton's conceptual and methodological contributions to the understanding of normal and pathological development, we discuss agenesis of the corpus callosum (CC), criteria for potential neuroanatomical compensatory mechanisms in CC agenesis, and the results of an examination of magnetic resonance imaging (MRI) data of the CC in 193 children with spina bifida meningomyelocele (SBM). There were 26 CC regional patterns. Although complete agenesis did not occur, partial agenesis was observed in 102 children and within 15 CC regional patterns. Only 4.1% had a normal CC. Quantitative assessment of the area of the CC in 26 NC children and 68 children with SBM revealed that all subgroups with CC anomalies had smaller areas than did a subgroup with a normal CC. Areas were especially small in rostral/splenial agenesis and splenial agenesis but larger with rostral agenesis. Subgroups with normal/hypoplastic regions or complete hypoplasia also had CC areas that were smaller than normal but larger than the areas for the splenial agenesis groups. The relative rarity of anterior commissure enlargement (3.1%) and longitudinal bundles of Probst (0.1%) suggest that these particular fiber tract anomalies are unlikely candidates for structural compensatory mechanisms. The hippocampal commissure, enlarged in 13%, may be a more promising candidate. Overall, however, the functionality of anomalous fiber tracts and commissures in SBM is yet to be determined. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Clinical & Experimental Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Partial agenesis of the corpus callosum in spina bifida meningomyelocele and potential compensatory mechanisms.
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  Data: <searchLink fieldCode="AR" term="%22Hannay%2C+H%2E+Julia%22">Hannay, H. Julia</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dennis%2C+Maureen%22">Dennis, Maureen</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kramer%2C+Larry%22">Kramer, Larry</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Blaser%2C+Susan%22">Blaser, Susan</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fletcher%2C+JackM%2E%22">Fletcher, JackM.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Clinical+%26+Experimental+Neuropsychology%22">Journal of Clinical & Experimental Neuropsychology</searchLink>. Feb2009, Vol. 31 Issue 2, p180-194. 15p. 2 Black and White Photographs, 4 Charts, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Myelomeningocele%22">Myelomeningocele</searchLink><br /><searchLink fieldCode="DE" term="%22Neural+tube+defects%22">Neural tube defects</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+resonance+imaging%22">Magnetic resonance imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Anterior+commissure%22">Anterior commissure</searchLink><br /><searchLink fieldCode="DE" term="%22Brain+anatomy%22">Brain anatomy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: After a review of Arthur Benton's conceptual and methodological contributions to the understanding of normal and pathological development, we discuss agenesis of the corpus callosum (CC), criteria for potential neuroanatomical compensatory mechanisms in CC agenesis, and the results of an examination of magnetic resonance imaging (MRI) data of the CC in 193 children with spina bifida meningomyelocele (SBM). There were 26 CC regional patterns. Although complete agenesis did not occur, partial agenesis was observed in 102 children and within 15 CC regional patterns. Only 4.1% had a normal CC. Quantitative assessment of the area of the CC in 26 NC children and 68 children with SBM revealed that all subgroups with CC anomalies had smaller areas than did a subgroup with a normal CC. Areas were especially small in rostral/splenial agenesis and splenial agenesis but larger with rostral agenesis. Subgroups with normal/hypoplastic regions or complete hypoplasia also had CC areas that were smaller than normal but larger than the areas for the splenial agenesis groups. The relative rarity of anterior commissure enlargement (3.1%) and longitudinal bundles of Probst (0.1%) suggest that these particular fiber tract anomalies are unlikely candidates for structural compensatory mechanisms. The hippocampal commissure, enlarged in 13%, may be a more promising candidate. Overall, however, the functionality of anomalous fiber tracts and commissures in SBM is yet to be determined. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Clinical & Experimental Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Feb2009
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