Abstract：
:To assess binocular interactions and possible ocular dominance in entrainment of circadian rhythms, Syrian hamsters maintained in LL were subjected for several weeks to schedules of eye occlusion with opaque contact lenses. In separate groups, the opaque lens was inserted into the left or right eye for 12 h at the same clock time each day. The left and right eyes of other groups were alternately occluded for 12 h each day, with initial occlusion of either the left or right eye for different groups. A majority of hamsters entrained their locomotor activity rhythm when 1 eye was occluded for 12 h. The modified visual input imposed by covering 1 eye is sufficient to induce entrainment. Locomotor rhythms of most animals in which the 2 eyes were alternately occluded for 12 h each day phasedelayed onset of activity during the 1st few days of the lensing procedure; activity onset then free ran with tau < 24 h for several weeks until entraining with tau of 24 h regardless of whether the left or right eye was initially occluded. Entrainment eventually occurred when activity onset coincided with occlusion of the eye contralateral to the one that was first lensed. Photic and nonphotic explanations for eventual entrainment of locomotor rhythms are discussed, and evidence for asymmetrical photic input from the 2 eyes to the SCN is considered.
journal_name
J Biol Rhythmsjournal_title
Journal of biological rhythmsauthors
Park JH,Paul MJ,Butler MP,Zucker Idoi
10.1177/0748730404272967subject
Has Abstractpub_date
2005-02-01 00:00:00pages
49-59issue
1eissn
0748-7304issn
1552-4531pii
20/1/49journal_volume
20pub_type
杂志文章abstract：:Many mammalian cell types show daily rhythms in gene expression driven by a circadian pacemaker. For example, cultured astrocytes display circadian rhythms in Period1 and Period2 expression. It is not known, however, how or which intercellular factors synchronize and sustain rhythmicity in astrocytes. Because astrocyt...
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abstract：:A rhythm mutant of Drosophila melanogaster was induced by chemical mutagenesis and isolated by testing for locomotor activity rhythms, which in the new variant had periods of approximately 16 hr. The sex-linked mutation responsible for this ultrashort period causes 20-hr rhythms when heterozygous with a normal X. This...
journal_title：Journal of biological rhythms
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pub_type： 杂志文章,评审
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
pub_type： 信件
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journal_title：Journal of biological rhythms
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更新日期：2006-12-01 00:00:00
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
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更新日期：2019-10-01 00:00:00
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
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更新日期：2008-12-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
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更新日期：2015-10-01 00:00:00
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journal_title：Journal of biological rhythms
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journal_title：Journal of biological rhythms
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更新日期：1997-04-01 00:00:00
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更新日期：2001-12-01 00:00:00
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journal_title：Journal of biological rhythms
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