Abstract:
:Ten healthy adults encountered pictures of unfamiliar archaic tools and successfully learned either their name, verbal definition of their usage, or both. Neural representation of the newly acquired information was probed with magnetoencephalography in an overt picture-naming task before and after learning, and in two categorization tasks after learning. Within 400 ms, activation proceeded from occipital through parietal to left temporal cortex, inferior frontal cortex (naming) and right temporal cortex (categorization). Comparison of naming of newly learned versus familiar pictures indicated that acquisition and maintenance of word forms are supported by the same neural network. Explicit access to newly learned phonology when such information was known strongly enhanced left temporal activation. By contrast, access to newly learned semantics had no comparable, direct neural effects. Both the behavioral learning pattern and neurophysiological results point to fundamentally different implementation of and access to phonological versus semantic features in processing pictured objects.
journal_name
Hum Brain Mappjournal_title
Human brain mappingauthors
Hultén A,Vihla M,Laine M,Salmelin Rdoi
10.1002/hbm.20561subject
Has Abstractpub_date
2009-03-01 00:00:00pages
976-89issue
3eissn
1065-9471issn
1097-0193journal_volume
30pub_type
杂志文章abstract::Imagination and creative cognition are often associated with the brain's default network (DN). Recent evidence has also linked cognitive control systems to performance on tasks involving imagination and creativity, with a growing number of studies reporting functional interactions between cognitive control and DN regi...
journal_title:Human brain mapping
pub_type: 杂志文章
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journal_title:Human brain mapping
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journal_title:Human brain mapping
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pub_type: 杂志文章,评审
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journal_title:Human brain mapping
pub_type: 杂志文章,评审
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journal_title:Human brain mapping
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doi:10.1002/hbm.22667
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pub_type: 杂志文章
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pub_type: 杂志文章,多中心研究
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journal_title:Human brain mapping
pub_type: 杂志文章,meta分析
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pub_type: 杂志文章,meta分析
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journal_title:Human brain mapping
pub_type: 杂志文章
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journal_title:Human brain mapping
pub_type: 杂志文章
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