Abstract:
:The effect of cage size on spontaneous locomotor rhythms of laboratory mice was studied under simulated light-dark (12:12) cycles. On-line image analysis of bodily displacement yielded a locomotor signal over a period of 3 days. Continuous wavelet transform was applied to the signal, and ensemble averaging of eight mice revealed in the time-frequency plot bouts of increased motor activities. Notably, there were two bouts in the dark corresponding to ultradians of periods below 5 h: a first bout at the dark onset (at 0.6-1.0 cycle/h), and a second bout during the second half of the dark period (at 0.4-0.7 cycle/h). These increases of activity were more intense and distinct when the animals were kept inside the larger cage. Furthermore, the first bout disappeared when the animals were kept in the small cage for 3 days.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Poon AM,Wu BM,Poon PW,Cheung EP,Chan FH,Lam FKdoi
10.1016/s0031-9384(97)00305-3subject
Has Abstractpub_date
1997-12-01 00:00:00pages
1253-8issue
6eissn
0031-9384issn
1873-507Xpii
S0031-9384(97)00305-3journal_volume
62pub_type
杂志文章abstract::Physical restraint, like many other stressors, can block early pregnancy, but the underlying physiological mechanisms have not been established. Exogenous estrogens in minute doses will also block early pregnancy. In the present study, female rats were exposed to 5 h of restraint daily for the first 5 days after insem...
journal_title:Physiology & behavior
pub_type: 杂志文章
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journal_title:Physiology & behavior
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journal_title:Physiology & behavior
pub_type: 杂志文章
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journal_title:Physiology & behavior
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journal_title:Physiology & behavior
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更新日期:1988-01-01 00:00:00
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journal_title:Physiology & behavior
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journal_title:Physiology & behavior
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journal_title:Physiology & behavior
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Physiology & behavior
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