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在神经性厌食症中,第六个手指的幻觉
Federico Brusa1, Denise Cadete2, Anna Sedda3,4
1Laboratorio Sperimentale di Ricerche di Neuroscienze Metaboliche e U.O. di Riabilitazione dei Disturbi Alimentari e della Nutrizione, IRCCS Istituto Auxologico Italiano, Ospedale San Giuseppe, Piancavallo, Italy.
概括
与健康对照组相比,患有神经性厌食症 (AN) 的人对虚幻的额外手指的身体表现不那么灵活. 这表明AN中的身体表示可塑性是域特定的,而不是普遍的.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 身体感知 身体感知
背景情况:
- 神经性厌食症 (AN) 与身体表现的改变有关,特别是在体现和运动图像中.
- 之前在健康对照组 (HC) 中的研究表明,身体部位的虚幻不仅限于姿势.
- 在AN中超数的身体部位的身体表征仍然在很大程度上未被探索.
研究的目的:
- 为了研究与AN和HC的个体之间对超数的身体部位的身体表现的可塑性差异.
- 评估AN如何影响在不同手指方向上对虚幻的第六指的感知.
主要方法:
- 采用第六个手指的幻觉,通过使用相互矛盾的视觉触觉信号诱导一个虚幻的额外的手指.
- 测试了30名参与者与AN和30 HC在四个同步的视觉触觉抚摸方向 (0°,90°,135°,180°) 和对照.
- 使用所有权问卷来评估感知指的方向和第六个手指的感觉方向.
主要成果:
- 无论AN和HC组都经历了所有测试方向的第六个手指幻觉,无论生物力学约束如何.
- 与HC相比,AN参与者认为虚幻的第六个手指更接近手的实际位置.
- AN参与者在额外的手指的感知方向上表现出较低的灵活性.
结论:
- 这项研究揭示,虽然患有AN的个体表现出改变的身体表征,但这种高度可塑性并非在所有身体自我领域普遍存在.
- 在感知超数的身体部位的方向时,灵活性降低表明AN的特定缺陷.
- 这些发现挑战了对神经性厌食症一般化身体表现灵活性的概念,突出了特定领域的改变.
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