Hamill N J, McGinn M D, Horowitz J M
Department of Animal Physiology, University of California, Davis 95616.
J Comp Physiol B. 1989;159(2):167-72. doi: 10.1007/BF00691737.
Auditory brainstem responses (ABRs) were recorded in ground squirrels (Citellus lateralis) arousing from hibernation. Squirrels implanted with recording screws to record ABRs, and a thermistor to record brain temperature, were placed in a cold room at 9 degrees C on a 2L:22D light-dark cycle. Hibernating animals were moved from the cold room and ABRs recorded during arousal. The responses showed a gradual development of all brainstem peaks. At low temperatures there were very long latencies to the peaks. The amplitudes of the peaks increased (with fluctuations) as brain temperature increased. The data indicate that neural generators on the brainstem auditory pathway were all activated early in arousal. These results do not support the hypothesis that successive peaks appear and grow in amplitude only after previous peaks are fully developed.
在从冬眠中苏醒的地松鼠（侧纹黄鼠）身上记录听觉脑干反应（ABR）。将植入记录螺钉以记录ABR以及植入热敏电阻以记录脑温的松鼠置于9摄氏度的冷室中，采用2小时光照：22小时黑暗的明暗循环。将处于冬眠状态的动物从冷室移出，并在苏醒过程中记录ABR。反应显示所有脑干波峰逐渐显现。在低温时，波峰的潜伏期非常长。随着脑温升高，波峰的振幅增大（伴有波动）。数据表明，脑干听觉通路上的神经发生器在苏醒早期均被激活。这些结果不支持仅在前一波峰完全形成后后续波峰才出现并增大振幅的假说。
