Neural Adaptation to Thin and Fat Bodies in the Fusiform Body Area and Middle Occipital Gyrus: An fMRI Adaptation Study
Neural Adaptation to Thin and Fat Bodies in the Fusiform Body Area and Middle Occipital Gyrus: An fMRI Adaptation Study
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DOI：
10.1002/hbm.22135
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发表时间：
2013-12-01
影响因子：
4.8
通讯作者：
Mohr, Harald M.
中科院分区：
文献类型：
--
作者：
Hummel, Dennis;Rudolf, Anne K.;Mohr, Harald M.
由于暴露于环境中的特定刺激，视觉感知可能会产生强烈的偏差，通常会导致神经适应和视觉后效。在这项研究中，我们调查了是否适应某些身体形状的偏见自己的身体形状的看法。此外，我们的目的是唤起神经适应某些身体形状。参与者完成了一个行为实验（n = 14），以率操纵自己的身体图片后，适应自己的身体明显瘦或胖的图片。在第二个实验中使用相同的刺激（n = 16），使用功能性磁共振成像（fMRI）适应。在行为实验中，在适应了自己身体的薄照片后，参与者也认为比实际身体更薄的照片是最真实的，反之亦然，类似于典型的后效。梭状体区（FBA）和右侧中枕回（rMOG）表现出对特定体形的神经适应，而双侧纹外体区（EBA）则没有。rMOG簇对身体和可能的身体部位具有高度选择性。行为实验的结果支持存在一个知觉的身体形状后效应，从一个特定的适应自己的身体瘦和胖的图片。fMRI结果表明，身体形状的适应发生在FBA和rMOG。EBA在身体形状加工中的作用仍然不清楚。结果也讨论了临床身体形象的干扰。《脑地图》34：3233-3246，2013年。(c)2012 Wiley Periodicals，Inc.
Visual perception can be strongly biased due to exposure to specific stimuli in the environment, often causing neural adaptation and visual aftereffects. In this study, we investigated whether adaptation to certain body shapes biases the perception of the own body shape. Furthermore, we aimed to evoke neural adaptation to certain body shapes. Participants completed a behavioral experiment (n = 14) to rate manipulated pictures of their own bodies after adaptation to demonstratively thin or fat pictures of their own bodies. The same stimuli were used in a second experiment (n = 16) using functional magnetic resonance imaging (fMRI) adaptation. In the behavioral experiment, after adapting to a thin picture of the own body participants also judged a thinner than actual body picture to be the most realistic and vice versa, resembling a typical aftereffect. The fusiform body area (FBA) and the right middle occipital gyrus (rMOG) show neural adaptation to specific body shapes while the extrastriate body area (EBA) bilaterally does not. The rMOG cluster is highly selective for bodies and perhaps body parts. The findings of the behavioral experiment support the existence of a perceptual body shape aftereffect, resulting from a specific adaptation to thin and fat pictures of one's own body. The fMRI results imply that body shape adaptation occurs in the FBA and the rMOG. The role of the EBA in body shape processing remains unclear. The results are also discussed in the light of clinical body image disturbances. Hum Brain Mapp 34:3233-3246, 2013. (c) 2012 Wiley Periodicals, Inc.