School of Psychology, University of Nottingham, University Park, Nottingham NG7 2RD, UK.
Department of Psychology, University of York, Heslington, York YO10 5DD, UK.
Dev Cogn Neurosci. 2018 Jan;29:78-85. doi: 10.1016/j.dcn.2017.04.007. Epub 2017 Apr 27.
Recent research suggests visuo-tactile binding is temporally extended in autism spectrum disorders (ASD), although it is not clear whether this specifically underlies altered body representation in this population. In the current study children and adolescents with ASD, and typically developing controls, placed their hand into mediated reality system (MIRAGE) and saw two identical live video images of their own right hand. One image was in the proprioceptively correct location (veridical hand) and the other was displaced to either side. While visuo-tactile feedback was applied via brushstroke to the participant's (unseen) right finger, they viewed one hand image receiving synchronous brushstrokes and the other receiving brushstrokes with a temporal delay (60, 180 and 300ms). After brushing, both images disappeared from view and participants pointed to a target, with direction of movement indicating which hand was embodied. ASD participants, like younger mental aged-matched controls, showed reduced embodiment of the spatially incongruent, but temporally congruent, hand compared to chronologically age-matched controls at shorter temporal delays. This suggests development of visuo-tactile integration may be delayed in ASD. Findings are discussed in relation to atypical body representation in ASD and how this may contribute to social and sensory difficulties within this population.
最近的研究表明，自闭症谱系障碍（ASD）患者的视触绑定在时间上延长，尽管尚不清楚这是否是该人群中身体表象改变的具体原因。在当前的研究中，ASD 儿童和青少年以及典型发育对照组将手放入介导现实系统（MIRAGE）中，并看到自己右手的两个相同的实时视频图像。一个图像位于 proprioceptively 正确的位置（真实手），另一个图像被移动到两侧。当通过笔触将视触反馈应用于参与者（看不见的）右手手指时，他们可以看到一只手图像接收同步笔触，另一只手图像接收延迟 60、180 和 300ms 的笔触。笔触之后，两个图像都从视图中消失，参与者指向一个目标，运动方向表示哪个手被体现。与年龄匹配的对照组相比，ASD 参与者，就像年轻的心理年龄匹配的对照组一样，在手的空间上不一致但时间上一致的情况下，表现出对身体的体现减少，与年龄匹配的对照组相比，在更短的时间延迟下。这表明 ASD 患者的视触整合发展可能延迟。研究结果与 ASD 中的异常身体表象以及这种表象如何导致该人群中的社交和感官困难有关。
