Lockery S R, Rawlins J N, Gray J A
Behav Neurosci. 1985 Apr;99(2):333-41. doi: 10.1037//0735-7044.99.2.333.
The shortening reflex was elicited in food-sated Hirudo medicinalis by light flashes delivered at 20-s intervals over a 40-trial session. The reflex was enhanced if animals were stored at 5-7 degrees C rather than 20 degrees C. Short-term, that is, within-sessions, habituation was readily observed. Dishabituation could be produced by a single electric shock at Trial 30. However, the shock also enhanced responding when delivered before Trial 1 (sensitization). No long-term, that is, between-sessions, habituation occurred over 6 consecutive days of testing; on the contrary, responding gradually increased.
在饱腹的医用水蛭中，通过在40次试验过程中每隔20秒发出一次闪光来引发缩短反射。如果将动物饲养在5 - 7摄氏度而不是20摄氏度的环境中，反射会增强。短期内，即在试验过程中，很容易观察到习惯化现象。在第30次试验时单次电击可产生去习惯化。然而，在第1次试验前施加电击时，电击也会增强反应（敏化）。在连续6天的测试中，没有出现长期的，即不同试验间的习惯化现象；相反，反应逐渐增强。
