Binkley S, Mosher K
Biology Department, Temple University, Philadelphia, Pennsylvania 19122.
J Biol Rhythms. 1987 Spring;2(1):1-11. doi: 10.1177/074873048700200101.
Circadian responses were studied using the perching activity of house sparrows (Passer domesticus). The sparrows were subjected to single or double 4-hr light pulses (the single pulses or the second pulses of the doublets scanned 24 hr) in the first cycle after previous entrainment to a light-dark cycle (LD 12:12). The differences in times at which the birds commenced perch-hopping in LD 12:12 before the pulses and in the five cycles immediately following the pulses were determined (phase shifts). A 24-hr time profile for phase shifts in response to single light pulses replicated our previous study: Early-night pulses delayed the rhythm (-1.7 hr), while late-night pulses advanced the rhythm (+3.8 hr). After pretreatment with a light pulse that advanced the birds +2.7 hr, the resetting curve was advanced. There were no delays; the range of average shifts was +0.1 hr to +6.2 hr. After pretreatment with a light pulse that delayed the birds -1.7 hr, the resetting curve was delayed. Average delays as much as -1.1 hr and advances up to +2.1 hr were measured. The data for double pulses were interpreted from predictions made from single-pulse data.
利用家麻雀（Passer domesticus）的栖息活动研究了昼夜节律反应。在前一个周期将麻雀置于明暗循环（LD 12:12）中进行同步化处理后，在第一个周期对其施加单次或双次4小时光脉冲（单次脉冲或双次脉冲中的第二个脉冲扫描24小时）。确定了鸟类在脉冲前的LD 12:12中开始跳跃栖息的时间与紧接脉冲后的五个周期中的时间差异（相移）。对单次光脉冲反应的相移的24小时时间剖面图重复了我们之前的研究：傍晚脉冲使节律延迟（-1.7小时），而深夜脉冲使节律提前（+3.8小时）。在用使鸟类提前+2.7小时的光脉冲预处理后，重置曲线提前。没有延迟；平均相移范围为+0.1小时至+6.2小时。在用使鸟类延迟-1.7小时的光脉冲预处理后，重置曲线延迟。测量到的平均延迟高达-1.1小时，提前高达+2.1小时。双脉冲的数据是根据单次脉冲数据的预测来解释的。
