Asli Ole, Flaten Magne Arve
Department of Psychology, University of Tromsø, N-9037 Tromsø, Norway.
Int J Psychophysiol. 2008 Jan;67(1):17-22. doi: 10.1016/j.ijpsycho.2007.09.003. Epub 2007 Oct 4.
The present study (N=40) investigated the time-course of conditioned facilitation of the unconditioned eyeblink reflex (UR). In a single-cue delay classical conditioning procedure, a tone conditioned stimulus (CS) signaled an airpuff unconditioned stimulus (airpuff US) to the eye. A paired group received 40 trials of CS/US presentations with an interstimulus interval (ISI) of 200 ms. An unpaired group received an equal number of explicitly unpaired presentations of the CS and US. Thereafter, eyeblink reflex facilitation was assessed by presenting 94 dB white noise (noise US) 10, 30, 50, 100, 150, and 1000 ms after CS onset. In the paired group, URs were significantly increased as early as 100 ms after CS onset compared to the unpaired group. This reflex facilitation was correlated with CR magnitude, indicating that conditioned facilitation of eyeblink URs indexes an early, automatic, preattentive stage in CR formation.
本研究（N = 40）调查了条件性促进非条件性眨眼反射（UR）的时间进程。在单线索延迟经典条件反射程序中，一个音调条件刺激（CS）向眼睛发出吹气非条件刺激（吹气US）的信号。配对组接受了40次CS/US呈现试验，刺激间隔（ISI）为200毫秒。非配对组接受了数量相等的CS和US明确非配对呈现。此后，通过在CS开始后10、30、50、100、150和1000毫秒呈现94分贝白噪声（噪声US）来评估眨眼反射促进情况。在配对组中，与非配对组相比，早在CS开始后100毫秒时UR就显著增加。这种反射促进与条件反应（CR）幅度相关，表明眨眼UR的条件性促进标志着CR形成中的一个早期、自动、前注意阶段。
