Twin-singleton differences in neonatal brain structure

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Publication Type pre-print
School or College <blank>
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Creator Gerig, Guido
Other Author Knickmeyer, Rebecca C.; Kang, Chaeryon; Woolson, Sandra; Smith, J. Keith; Hamer, Robert M.; Lin, Weili; Styner, Martin; Gilmore, John H.
Title Twin-singleton differences in neonatal brain structure
Date 2011-01-01
Description Twin studies suggest that global and regional brain volumes are highly heritable. However, estimates of heritability vary across development. Given that all twin studies are open to the potential criticism of non-generalizability due to differences in intrauterine environment between twins and singletons, these age effects may reflect the influence of perinatal environmental factors which are unique to twins and which may be especially evident early in life. To address this question, we compared brain volumes and the relationship of brain volumes to gestational age in 136 singletons (67 male, 69 female) and 154 twins (75 male, 79 female; 82 DZ, 72 MZ) who had received high resolution MRI scans of the brain in the first month of life. Intracranial volume, total white matter, and ventricle volumes did not differ between twins and singletons. However, cerebrospinal fluid and frontal white matter volume was greater in twins compared to singletons. While gray matter volumes at MRI did not differ between groups, the slope of the relationship between total and cortical gray matter and gestational age at the MRI scan was steeper in MZ twins compared to DZ twins. Post-hoc analyses suggested that gray matter development is delayed in MZ twins in utero and that they experience "catch-up" growth in the first month of life. These differences should be taken into account when interpreting and designing studies in the early postnatal period.
Type Text
Publisher Cambridge University Press
Volume 14
Issue 3
First Page 268
Last Page 276
Language eng
Bibliographic Citation Knickmeyer, R. C., Kang, C., Woolson, S., Smith, J. K., Hamer, R. M., Lin, W., Gerig, G., Styner, M., & Gilmore, J. H. (2011). Twin-singleton differences in neonatal brain structure. Twin Research and Human Genetics, 14(3), 268-76.
Rights Management (c) Cambridge University Press http://www.cambridge.org/ Permission granted by Cambridge University Press for non-commercial, personal use only.
Format Medium application/pdf
Format Extent 374,397 bytes
Identifier uspace,19194
ARK ark:/87278/s6vf07mq
Setname ir_uspace
Date Created 2015-01-24
Date Modified 2015-01-28
ID 712782
Reference URL https://collections.lib.utah.edu/ark:/87278/s6vf07mq
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