Abstract:
:Single unit activity was recorded in the striate cortex of vision-deprived cats aged between 3 and 8 weeks. Contrast sensitivity or response measurements made using moving sinusoidal gratings were used to construct spatial frequency tuning curves. At 3 weeks sensitivity, selectivity (assessed both as the narrowness of the tuning curve bandwidth and as the proportion of selective cells), and optimal spatial frequency, are all better than in 2 week old normally reared cats, and comparable with those of 3 week old normally reared cats. After 3 weeks of age no further improvements take place, although distributions of sensitivity, best spatial frequency and bandwidth overlap with those of normal cortical cells, and selectivity is clearly better than in adult LGN cells. These results are consistent with the idea that the spatial properties of cortical cells are at least partly predetermined, but that many cells require visual experience to develop normally.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Derrington AMdoi
10.1007/BF00235273subject
Has Abstractpub_date
1984-01-01 00:00:00pages
431-7issue
3eissn
0014-4819issn
1432-1106journal_volume
55pub_type
杂志文章abstract::Reduced short-interval intracortical inhibition (SICI) is reported in Parkinson's disease (PD) and is considered to reflect abnormal GABAergic inhibitory system of the primary motor cortex in PD. We have recently shown, however, that SICI using anterior-posterior directed currents in the brain was normal in focal dyst...
journal_title:Experimental brain research
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journal_title:Experimental brain research
pub_type: 杂志文章
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journal_title:Experimental brain research
pub_type: 杂志文章
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journal_title:Experimental brain research
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journal_title:Experimental brain research
pub_type: 杂志文章
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journal_title:Experimental brain research
pub_type: 杂志文章
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journal_title:Experimental brain research
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pub_type: 杂志文章
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更新日期:2014-06-01 00:00:00
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journal_title:Experimental brain research
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journal_title:Experimental brain research
pub_type: 杂志文章,评审
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journal_title:Experimental brain research
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更新日期:2010-01-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
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journal_title:Experimental brain research
pub_type: 杂志文章
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更新日期:1991-01-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2008-09-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
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更新日期:2008-10-01 00:00:00
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journal_title:Experimental brain research
pub_type: 杂志文章
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