A comparison of saccadic and blink suppression in normal observers
A comparison of saccadic and blink suppression in normal observers
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DOI：
10.1016/s0042-6989(97)00110-7
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发表时间：
1997-11-01
期刊：
影响因子：
1.8
通讯作者：
Tomlinson, A
中科院分区：
文献类型：
--
作者：
Ridder, WH;Tomlinson, A
最近的研究表明，眨眼和跳眼抑制是由相同的机制产生的(Volkmann, 1986; Uchikawa & Sate, 1995；Ridder & Tomlinson, 1993, 1995)，这些研究表明，眨眼和扫视抑制对各种视觉功能的影响是相同的，但是，这些研究都没有对同一个体的眨眼和扫视抑制进行比较，本研究的目的是比较眨眼和扫视抑制对同一受试者对比敏感功能的影响。采用二选一的强迫选择技术，测量了7个空间频率的阈值，在每个空间频率上，阈值是在检测到自发性扫视后立即确定的，抑制幅度作为注视刺激时获得的对比灵敏度与扫视时获得的对比灵敏度的对数比。扫视抑制的幅度随着扫视幅度的增加而增加，并且与空间频率相关，低空间频率比高空间频率更能被抑制。之前已经测量过眨眼抑制数据（Ridder & Tomlinson, 1993），扫视抑制和眨眼抑制在质量上是相似的，数据的垂直移位使扫视抑制和眨眼抑制数据进入寄存器。这些结果表明眨眼和扫视抑制是由相同或相似的机制产生的。1997爱思唯尔科学有限公司
Recent research suggests that blink and saccadic suppression are produced by the same mechanism (Volkmann, 1986; Uchikawa & Sate, 1995; Ridder & Tomlinson, 1993, 1995), These studies demonstrated that blink and saccadic suppression have the same effect on various visual functions, However, none of these studies made a comparison of blink and saccadic suppression in the same individual, The purpose of this study was to compare the effects of blink and saccadic suppression on contrast sensitivity functions in the same subject, The effect of saccadic suppression on the contrast sensitivity function in three normal observers was determined, Employing a two-alternative, forced-choice technique, thresholds were measured for seven spatial frequencies, At each spatial frequency, the threshold was determined immediately following detection of a voluntary saccade, The magnitude of suppression was taken as the log ratio of the contrast sensitivities obtained while foveating the stimulus and those obtained during saccades, The magnitude of saccadic suppression was found to increase as the saccade amplitude increased and to be spatial-frequency dependent, Low spatial frequencies were suppressed more than high spatial frequencies, The blink suppression data have been measured previously (Ridder & Tomlinson, 1993), Saccadic and blink suppression were qualitatively similar, A vertical shift of the data brought the saccadic and blink suppression data into register, These results suggest that blink and saccadic suppression are produced by the same or similar mechanisms. (C) 1997 Elsevier Science Ltd.