THE RAT PINEAL N-ACETYLTRANSFERASE RHYTHM PERSISTS AFTER A 5-HOUR, BUT DISAPPEARS TEMPORARILY AFTER A 7-HOUR ADVANCE OF THE LIGHT DARK CYCLE - A 6-HOUR SHIFT MAY BE A TURNING POINT

被引:5
作者
ILLNEROVA, H
HUMLOVA, M
机构
[1] Institute of Physiology, Czechoslovak Academy of Sciences, Prague
关键词
Circadian rhythm; Entrainment; N-Acetyltransferase; Pineal; Rat;
D O I
10.1016/0304-3940(90)90790-G
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
After a 5-h advance of a lighting regime with 12 h of light and 12 h of darkness by shortening of one dark period, the rat pineal N-acetyltransferase (NAT) rhythm was retained, though at the beginning in a changed waveform, and re-entrained to the shift within 5 to 6 cycles. After a 7-h advance of the regime, the NAT rhythm faded away between the 2nd and 4th cycle and re-entrained to the shift within 7 cycles. A 6-h advance of the lighting regime might thus be a turning point for the persistence or temporal disappearance of the NAT rhythm. © 1990.
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页码:77 / 81
页数:5
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