Perceiving and acting upon weight illusions in the absence of somatosensory information.
Perceiving and acting upon weight illusions in the absence of somatosensory information.
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在缺乏体感信息的情况下感知重量错觉并采取行动。
DOI：
10.1152/jn.00587.2015
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发表时间：
2016
影响因子：
2.5
通讯作者：
J. Cole
中科院分区：
文献类型：
--
作者：
G. Buckingham;E. Michelakakis;J. Cole
当举起新的物体时，个体的指尖力受到各种线索的影响，如体积和外观材料。这意味着看起来重的物体往往比看起来轻的物体更容易被举起，即使它们的重量相同。基于视觉外观对物体重量的期望也会影响物体被举起时的感觉。例如，在“大小重量错觉”中，小物体感觉比同等重量的大物体重。类似地，在“材料重量错觉”中，看起来由轻材料制成的物体感觉比看起来由重材料制成的相同重量的物体更重。在这项研究中，我们调查了IW的这些知觉和感觉运动效应，IW是一个患有外周传入阻滞的个体（即，触觉和本体感觉反馈的损失）。我们检查了他对重量和指尖力应用的感知，这些感知是通过反复举起大小或材料属性不同的物体来实现的。尽管IW能够报告真实的重量差异，但它似乎并没有经历尺寸或材料重量的错觉。此外，他没有证据表明基于大小和材料线索的感觉运动预测。结果进行了讨论的背景下，正向模型和它们可能对重量感知和指尖力控制的影响。
When lifting novel objects, individuals' fingertip forces are influenced by a variety of cues such as volume and apparent material. This means that heavy-looking objects tend to be lifted with more force than lighter-looking objects, even when they weigh the same amount as one another. Expectations about object weight based on visual appearance also influence how heavy an object feels when it is lifted. For instance, in the "size-weight illusion," small objects feel heavier than equally weighted large objects. Similarly, in the "material-weight illusion," objects that seem to be made from light-looking materials feel heavier than objects of the same weight that appear to be made from heavy-looking materials. In this study, we investigated these perceptual and sensorimotor effects in IW, an individual with peripheral deafferentation (i.e., a loss of tactile and proprioception feedback). We examined his perceptions of heaviness and fingertip force application over repeated lifts of objects that varied in size or material properties. Despite being able to report real weight differences, IW did not appear to experience the size- or material-weight illusions. Furthermore, he showed no evidence of sensorimotor prediction based on size and material cues. The results are discussed in the context of forward models and their possible influence on weight perception and fingertip force control.