Powell D A, Buchanan S L, Hernandez L L
Exp Aging Res. 1981 Winter;7(4):453-65. doi: 10.1080/03610738108259824.
The groups of New Zealand albino rabbits of approximately six and forty months of age respectively were subjected to Pavlovian conditioning in which a 1216 Hz, 75 dB tone served as the conditioning stimulus and a brief paraorbital electric shock train served as the unconditioned stimulus. Eyeblink and heart rate responses were assessed. Older animals revealed acquisition deficits in the somatomotor eyelid conditioning task compared to the young animals: however, the magnitude of the concomitantly occurring heart rate change was greater in older than in younger animals. These age-related changes appeared to be enhanced in males and were unrelated to general activity differences, or to the unconditioned response to unpaired tones or electric shocks.
分别对大约6个月和40个月大的新西兰白化兔进行巴甫洛夫条件反射实验，其中1216赫兹、75分贝的音调作为条件刺激，短暂的眶旁电击串作为非条件刺激。评估眨眼和心率反应。与年轻动物相比，老年动物在躯体运动眼睑条件反射任务中表现出习得缺陷：然而，老年动物伴随出现的心率变化幅度大于年轻动物。这些与年龄相关的变化在雄性中似乎更为明显，并且与一般活动差异、对未配对音调或电击的非条件反应无关。
