Am I seeing my hand? Visual appearance and knowledge of controllability both contribute to the visual capture of a person's own body.

Am I seeing my hand? Visual appearance and knowledge of controllability both contribute to the visual capture of a person's own body.
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DOI:
10.1098/rspb.2012.0750
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发表时间:
2012-09-07
期刊:
Proceedings. Biological sciences
影响因子:
--
通讯作者:
Naito E
Naito E
中科院分区:
其他
文献类型:
--
作者:
Hagura N;Hirose S;Matsumura M;Naito E

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在日常生活中面对复杂的视觉场景时,我们如何知道哪些视觉信息代表了我们自己的手?我们研究了用于将视觉信息分配给自己的手的线索。手腕肌腱的振动引起手腕运动的错觉。当实际的静止的手在视觉上呈现时,这种错觉的强度减弱。测试什么样的视觉刺激会减弱这种错觉,将阐明有助于视觉检测自己手的因素。当展示一个静止的物体时,这种错觉会减少,但只有当参与者知道它是可以用手控制的时候。相比之下,即使参与者知道自己的手是不可控制的,他们自己的手的视觉图像也会减弱这种错觉。我们建议将关于身体外观的长期知识和关于视觉对象可控性的短期知识相结合,以从视觉场景中稳健地提取我们自己的身体。
When confronted with complex visual scenes in daily life, how do we know which visual information represents our own hand? We investigated the cues used to assign visual information to one's own hand. Wrist tendon vibration elicits an illusory sensation of wrist movement. The intensity of this illusion attenuates when the actual motionless hand is visually presented. Testing what kind of visual stimuli attenuate this illusion will elucidate factors contributing to visual detection of one's own hand. The illusion was reduced when a stationary object was shown, but only when participants knew it was controllable with their hands. In contrast, the visual image of their own hand attenuated the illusion even when participants knew that it was not controllable. We suggest that long-term knowledge about the appearance of the body and short-term knowledge about controllability of a visual object are combined to robustly extract our own body from a visual scene.
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