所有权感对触觉感知的影响:预测编码算法是否适用于体质手幻觉?
Francesca G Magnani1, Martina Cacciatore1, Filippo Barbadoro1
1SC Neurologia, Salute Pubblica, Disabilità - Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.
Consciousness and cognition
|June 13, 2024
概括
身体上的手幻觉 (sRHI) 减少刺激手的触觉感知,甚至在没有视觉的情况下也暗示感官重量转移. 空间重新映射可能是错觉期间赋予感官信息的关键.
科学领域:
- 神经科学是一个神经科学.
- 感知心理学 感知心理学
- 身体感官研究研究 身体感官研究
背景情况:
- 预测编码框架通过改变感官信息权重来解释视觉触觉手幻觉 (vtRHI) 中的触觉感知变化.
- 这项研究调查了类似的感官加权调制是否发生在体质手幻觉 (sRHI) 中,该幻觉缺乏视觉输入.
研究的目的:
- 要确定触觉敏度是否受到体质手幻觉 (sRHI) 的调节.
- 测试sRHI改变刺激手和逆侧手体感官信息权重的假设.
- 探索空间重绘在幻觉期间感官信息归属中的作用.
主要方法:
- 在参与者接受视觉触觉 (vtRHI) 和体质 (sRHI) 手幻象之前和之后,测量了触觉敏度.
- 31名健康人参与了这项研究.
- 假设在sRHI期间从ipsilateral和contralateral手中的体感官输入的差异加权.
主要成果:
- 在sRHI期间,在体验幻觉的手上观察到触觉敏度的显著下降.
- 在sRHI期间,在对侧手中没有发现触觉敏度的显著变化.
- sRHI引发了对假手的所有权感,但没有涉及空间重新绘制.
结论:
- 身体上的手幻觉 (sRHI) 可以减弱触觉感知,表明没有视觉线索的感觉处理发生了变化.
- 在sRHI中缺乏对侧变化和空间重新映射表明这些因素可能对感官信息权重至关重要.
- 空间重新绘制可能在大脑如何在虚幻体验中赋予感官信息方面发挥关键作用.
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