Bocheva Nadejda, Hristov Ivan, Stefanov Simeon, Totev Tsvetalin, Staykova Svetla Nikolaeva, Mihaylova Milena Slavcheva
Department of Sensory Neurobiology, Institute of Neurobiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Department of Psychiatry and Medical Psychology, Sofia Medical University, 1431 Sofia, Bulgaria.
Behav Sci (Basel). 2022 Apr 18;12(4):113. doi: 10.3390/bs12040113.
Along with social, cognitive, and behavior deficiencies, peculiarities in sensory processing, including an atypical global motion processing, have been reported in Autism Spectrum Disorder (ASD). The question about the enhanced motion pooling in ASD is still debatable. The aim of the present study was to compare global motion integration in ASD using a low-density display and the equivalent noise (EN) approach. Fifty-seven children and adolescents with ASD or with typical development (TD) had to determine the average direction of movement of 30 Laplacian-of-Gaussian micro-patterns. They moved in directions determined by a normal distribution with a standard deviation of 2°, 5°, 10°, 15°, 25°, and 35°, corresponding to the added external noise. The data obtained showed that the ASD group has much larger individual differences in motion direction thresholds on external noise effect than the TD group. Applying the equivalent noise paradigm, we found that the global motion direction discrimination thresholds were more elevated in ASD than in controls at all noise levels. These results suggest that ASD individuals have a poor ability to integrate the local motion information in low-density displays.
除了社交、认知和行为缺陷外，自闭症谱系障碍（ASD）患者还存在感觉处理方面的特点，包括非典型的整体运动处理。关于ASD患者中增强的运动合并问题仍存在争议。本研究的目的是使用低密度显示和等效噪声（EN）方法比较ASD患者的整体运动整合情况。57名患有ASD或发育正常（TD）的儿童和青少年必须确定30个高斯拉普拉斯微图案的平均运动方向。它们的运动方向由标准差为2°、5°、10°、15°、25°和35°的正态分布决定，这对应于添加的外部噪声。获得的数据表明，与TD组相比，ASD组在外部噪声影响下运动方向阈值的个体差异要大得多。应用等效噪声范式，我们发现在所有噪声水平下，ASD患者的整体运动方向辨别阈值都比对照组更高。这些结果表明，ASD患者在低密度显示中整合局部运动信息的能力较差。
