Abstract：
:It is uncertain if the several brain areas in response to presemantic picture processing are functionally homogeneous. Subjects were asked to discriminate visual stimulus pairs and event-related potentials (ERPs) were recorded from the scalp. A line-drawing picture (S1) was followed by another stimulus (S2) 600 ms later. S2 was the same as S1 in condition 1, a reversed picture of S1 in condition 2, the corresponding Chinese word in condition 3 and the syllabic alphabet of S1 in condition 4. Amplitudes of ERPs over right posterior scalp with time window from 102-180 ms after the onset of S2 in condition 1 and 2 were significantly larger than condition 3 and 4. The N2 component on the right anterolateral scalp with time window from 182-240 ms was significantly larger in condition 1 than other conditions, whereas the N2 on the left anterolateral scalp with time window from 262-350 ms in condition 2, 3 and 4 was significantly larger than condition 1. It is suggested that pictures and words are processed in different systems at the presemantic stage: repetitive and physically deviant stimuli evoke different responses in different brain regions.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Wang Y,Tang X,Kong J,Zhuang D,Li Sdoi
10.1016/s0304-3940(98)00828-3subject
Has Abstractpub_date
1998-12-04 00:00:00pages
143-6issue
3eissn
0304-3940issn
1872-7972pii
S0304394098008283journal_volume
257pub_type
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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abstract：:Amplitudes of contingent negative variation (CNV) as a slow cortical potential in migraine patients were recorded before and after migraine attacks. The level of CNV amplitudes, especially of the early component, showed a trend in rise of negativity 1 day before the attack, whereas amplitudes were normal for 2-3 days ...
journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
pub_type： 杂志文章
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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journal_title：Neuroscience letters
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