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Abnormal sense of intention preceding voluntary movement in patients with psychogenic tremor.

机译:心因性震颤患者自愿运动前的异常意向感。

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摘要

Psychogenic tremor is the commonest psychogenic movement disorder, yet little is known of its pathophysiology. Given the presence of movements that appear from their physiological properties to be voluntarily produced, and yet are not experienced as such by the patients, we hypothesised that patients might have an abnormal conscious experience of volition with regard to self-generated movement. Nine patients with psychogenic tremor were asked to judge the timing of a self-paced button press relative to a clock displayed on a computer screen. In separate trials they were asked to judge the timing of their internal feeling of intention to move. These results were compared to those of healthy control participants. Patients with psychogenic tremor judged their feeling of intention to move significantly later compared to control participants. As a result, the interval between the perceived time of intention and the perceived time of action, which was highly significant in the control participants, was numerically smaller and non-significant in the patients. This study provides novel data that the sense of volition prior to movement is impaired in patients with psychogenic tremor. This fits with a pathophysiological explanation for this disorder based on an impairment of neural mechanisms that generate the conscious experience of action: actions that are voluntary in terms of their physiological origin might be experienced as involuntary.
机译:心因性震颤是最常见的心因性运动障碍,但对其病理生理学知之甚少。假定存在从其生理特性看来是自愿产生的运动,但患者并未经历过运动,我们假设患者可能会对自身产生的运动有异常的意识自觉体验。要求9名患有精神震颤的患者相对于计算机屏幕上显示的时钟来判断自定进度的按钮按压的时间。在单独的试验中,他们被要求判断其内向移动意愿的时机。将这些结果与健康对照参与者的结果进行比较。与对照组相比,患有心理性震颤的患者判断他们的意图移动明显较晚。结果,感知的意图时间和感知的作用时间之间的间隔在数值上较小,在患者中不显着,该间隔在对照组中非常重要。这项研究提供了新颖的数据,表明患有精神病性震颤的患者运动前的意志感受损。这符合这种疾病的病理生理学解释,其基于会产生有意识的行动经验的神经机制的损害:就其生理起源而言自愿的行动可能会被视为非自愿的。

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