Abstract：
:During middle childhood, continuous changes occur in electroencephalogram (EEG) coherence, an index of cortico-cortical connectivity of the brain. In the gradual development of EEG coher ence, occasional "growth spurts" are observed which coincide with periods of discontinuous development in cognition. Discontinuous development may reflect changes in the genetic architecture of a trait over time, for instance, by the emergence of new genetic factors. To examine stability and change in genetic and environmental influences on EEG coherence from ages 5 to 7 years, intrahemispheric EEG coherences from 14 connections were collected twice in 209 twin pairs. Overall, heritabilities (h2) were moderate to high for all EEG coherences at both ages (average: 58%). For occipito-cortical connections in the right hemisphere, h2 increased with age due to a decrease in environmental variance. For prefronto-cortical connections in the left hemisphere, h2 decreased with age due to a decrease in genetic variance. New genetic factors at age 7 were found for prefronto-parietal coherence, and centro-occipital and parieto-occipital EEG coherences in both hemispheres and, in the left hemisphere, for prefronto-frontal EEG coherences. Mean genetic correlation for these cortico-cortical connections over time was 0.72, indicating that at least part of the genetic influences is age-specific. We argue that this is convincing evidence for the existence of stage-wise brain maturation from years 5 to 7, and that growth spurts in EEG coherence may be part of the biological basis for discontinuous cognitive development at that age range.
journal_name
Behav Genetjournal_title
Behavior geneticsauthors
van Baal GC,Boomsma DI,de Geus EJdoi
10.1023/a:1013357714500subject
Has Abstractpub_date
2001-11-01 00:00:00pages
637-51issue
6eissn
0001-8244issn
1573-3297journal_volume
31pub_type
杂志文章abstract：:As a result of different feeding regimens, two laboratory populations of the beetle Callosobruchus maculatus Fab. developed different rates of oviposition. The behavior of the F1 hybrids cannot be explained with an additive model of inheritance. The unusual pattern of inheritance suggests a sex-related factor(s) and a...
journal_title：Behavior genetics
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journal_title：Behavior genetics
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journal_title：Behavior genetics
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journal_title：Behavior genetics
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pub_type： 杂志文章,多中心研究
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doi：10.1007/BF02361157
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1007/BF01073209
更新日期：1975-10-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1023/a:1016069012111
更新日期：2002-05-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1023/a:1021683716700
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journal_title：Behavior genetics
pub_type： 杂志文章,评审
doi：10.1007/BF01067420
更新日期：1993-03-01 00:00:00
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journal_title：Behavior genetics
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doi：10.1007/s10519-010-9332-6
更新日期：2010-03-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1007/BF01067986
更新日期：1993-09-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1023/a:1021671313974
更新日期：1998-07-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
doi：10.1007/s10519-020-10004-0
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pub_type： 评论,杂志文章
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journal_title：Behavior genetics
pub_type： 杂志文章
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更新日期：2006-03-01 00:00:00
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journal_title：Behavior genetics
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更新日期：2003-03-01 00:00:00
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更新日期：1981-07-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
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更新日期：2016-09-01 00:00:00
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journal_title：Behavior genetics
pub_type： 已发布勘误
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更新日期：2019-05-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
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更新日期：1995-07-01 00:00:00
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journal_title：Behavior genetics
pub_type： 杂志文章
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