TFMPP, a 5HT1B receptor agonist, inhibits light-induced phase shifts of the circadian activity rhythm and c-Fos expression in the mouse suprachiasmatic nucleus

1997 ◽  
Vol 231 (2) ◽  
pp. 95-98 ◽  
Author(s):  
Gary E Pickard ◽  
Michael A Rea
Keyword(s):  
Suprachiasmatic Nucleus ◽  
Receptor Agonist ◽  
Activity Rhythm ◽  
Phase Shifts ◽  
Circadian Activity ◽  
Circadian Activity Rhythm ◽  
Fos Expression ◽  
5Ht1b Receptor

Response of hamster circadian system to transitions between light and darkness

1986 ◽  
Vol 250 (4) ◽  
pp. R708-R711 ◽  
Author(s):  
H. E. Albers
Keyword(s):  
Activity Rhythm ◽  
Phase Shifts ◽  
Circadian System ◽  
Circadian Cycle ◽  
Circadian Activity ◽  
Syrian Hamsters ◽  
Circadian Activity Rhythm ◽  
Free Running ◽  
Activity Onset

The effects of exposure to sudden transitions from dark to light (DL) and light to dark (LD) were determined on the free-running circadian activity rhythm of Syrian hamsters. The activity rhythm was phase delayed by 1-2 h by DL transitions provided during the 12-h interval before activity onset (subjective day). In contrast, DL transitions produced phase advances of approximately 1 h 2-12 h after activity onset. LD transitions tended to produce phase advances throughout the circadian cycle. During the subjective day, LD transitions resulted in phase advances of up to 4 h. After the onset of activity, LD transitions produced phase advances of a lesser magnitude than during the subjective day. In addition, some phase delays were also observed. When the phase shifts produced by DL and LD transitions were combined additively these transitions could account for the phase shifts previously reported for brief pulses of light.

Serotonergic potentiation of photic phase shifts of the circadian activity rhythm

Neuroreport ◽  
1995 ◽  
Vol 6 (10) ◽  
pp. 1417-1420 ◽  
Author(s):  
Michael A. Rea ◽  
Jose Barrera ◽  
J. David Glass ◽  
Robert L. Gannon
Keyword(s):  
Activity Rhythm ◽  
Phase Shifts ◽  
Circadian Activity ◽  
Circadian Activity Rhythm

scholarly journals Developmental Alcohol Exposure Alters Light-Induced Phase Shifts of the Circadian Activity Rhythm in Rats

2004 ◽  
Vol 28 (7) ◽  
pp. 1020-1027 ◽  
Author(s):  
Yuhua Z. Farnell ◽  
James R. West ◽  
Wei-Jung A. Chen ◽  
Gregg C. Allen ◽  
David J. Earnest
Keyword(s):  
Activity Rhythm ◽  
Alcohol Exposure ◽  
Phase Shifts ◽  
Circadian Activity ◽  
Circadian Activity Rhythm
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