Grunwald Martin, Ettrich Christine, Busse Frank, Assmann Bianka, Dähne Angelika, Gertz Hermann-Joseph
Department of Psychiatry, EEG-Research Laboratory, University of Leipzig, Emilienstrasse 14, 04107 Leipzig, Germany.
Arch Clin Neuropsychol. 2002 Jul;17(5):485-96.
A functional disturbance of the right parietal cortex (PC) is supposed to be responsible for the distorted body image in patients with anorexia nervosa (AN). Based on this assumption, we investigated changes in haptic perception with a new experimental design.
Thirty-two subjects (16 AN patients and 16 healthy controls) were asked to readjust a given angle adjustment without visual feedback. This arrangement allowed to measure the deviation of the adjusted angle from the locked angle on an interval scale.
AN patients performed worse when they were asked to readjust the angle with the right hand, i.e., the deviation of the readjusted angle from the given angle was higher compared to the healthy controls for right side tasks.
The capacitive strain of the right PC is substantially stronger in right side tasks with the consequence that the functionally disturbed right PC of AN patients cannot provide enough processing resources.
右顶叶皮层（PC）的功能紊乱被认为是神经性厌食症（AN）患者身体意象扭曲的原因。基于这一假设，我们采用一种新的实验设计来研究触觉感知的变化。
32名受试者（16名AN患者和16名健康对照）被要求在没有视觉反馈的情况下重新调整给定的角度。这种设置能够在区间尺度上测量调整角度与锁定角度的偏差。
当要求AN患者用右手重新调整角度时，他们的表现更差，即与健康对照相比，在右侧任务中重新调整角度与给定角度的偏差更大。
在右侧任务中，右顶叶皮层的功能负荷明显更强，导致AN患者功能紊乱的右顶叶皮层无法提供足够的处理资源。
