Motion and form coherence processing in individuals with cerebral visual impairment.
Motion and form coherence processing in individuals with cerebral visual impairment.
复制标题
脑视觉障碍个体的运动和形式连贯性处理。
DOI：
10.1111/dmcn.15591
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发表时间：
2023
影响因子：
3.8
通讯作者：
Bex,PeterJ
中科院分区：
文献类型：
--
作者：
Merabet,LotfiB;Manley,ClaireE;Pamir,Zahide;Bauer,CorinnaM;Skerswetat,Jan;Bex,PeterJ
目的采用视觉心理物理学范式，探讨脑性视觉障碍（CVI）患者的运动阈值和形状一致性阈值分别作为背侧和腹侧视觉流加工的指标。我们还探讨了心理物理评估和脑损伤严重程度之间的潜在联系。（平均年龄= 17岁11个月[SD 5岁10个月];平均言语智商= 86.42 [SD 35.85]）和30名具有神经典型发育的个体（平均年龄= 20岁1个月[SD 3岁8个月];平均言语智商= 110.05 [SD 19.34]）参加了研究。在这两组比较，横断面研究设计，全球运动，和形式模式的连贯性阈值进行了评估，使用计算机化的，可推广的，自我管理，并响应自适应的心理物理学范式称为FInD（觅食互动D-总理）。结果一致背流功能障碍，平均全球运动（而不是形式）连贯性阈值显着高于个人与CVI相比，控制。在相干阈值和病变严重程度之间没有发现统计学上的显著关联。InterpretationThese结果表明，使用这种心理物理学范式对运动和形式相干阈值敏感性进行客观评估可能有助于描述感知缺陷和CVI复杂的临床特征。运动（而非形式）相干阈值显著高于对照组。2这些心理物理学结果支持CVI中背流功能障碍的概念。
AimUsing a visual psychophysical paradigm, we sought to assess motion and form coherence thresholds as indices of dorsal and ventral visual stream processing respectively, in individuals with cerebral visual impairment (CVI). We also explored potential associations between psychophysical assessments and brain lesion severity in CVI.MethodTwenty individuals previously diagnosed with CVI (mean age = 17 years 11 months [SD 5 years 10 months]; mean Verbal IQ = 86.42 [SD 35.85]) and 30 individuals with neurotypical development (mean age = 20 years 1 month [SD 3 years 8 months]; mean Verbal IQ = 110.05 [SD 19.34]) participated in the study. In this two‐group comparison, cross‐sectional study design, global motion, and form pattern coherence thresholds were assessed using a computerized, generalizable, self‐administrable, and response‐adaptive psychophysical paradigm called FInD (Foraging Interactive D‐prime).ResultsConsistent with dorsal stream dysfunction, mean global motion (but not form) coherence thresholds were significantly higher in individuals with CVI compared to controls. No statistically significant association was found between coherence thresholds and lesion severity.InterpretationThese results suggest that the objective assessment of motion and form coherence threshold sensitivities using this psychophysical paradigm may be useful in helping to characterize perceptual deficits and the complex clinical profile of CVI.What this paper addsIn participants with cerebral visual impairment (CVI), motion (but not form) coherence thresholds were significantly higher compared to controls.These psychophysical results support the notion of dorsal stream dysfunction in CVI.