The late positive potential, emotion and apathy in Parkinson's disease.

The late positive potential, emotion and apathy in Parkinson's disease.
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DOI:
10.1016/j.neuropsychologia.2013.01.001
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发表时间:
2013-04
期刊:
影响因子:
2.6
通讯作者:
Bowers D
Bowers D
中科院分区:
心理学3区
文献类型:
--
作者:
Dietz J;Bradley MM;Jones J;Okun MS;Perlstein WM;Bowers D

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帕金森病与情绪变化有关,包括抑郁、冷漠和焦虑。目前的研究使用电生理学测量方法——中央顶叶晚正电位(LPP),调查了患有帕金森病(PD)的非痴呆个体的情绪处理。患有帕金森病的非痴呆患者 (n=17) 和健康对照参与者 (n=16) 观看令人愉快、中性和不愉快的图片,同时从 64 通道测地网记录脑电图。帕金森病患者与对照组在指示知觉处理的早期电生理成分(枕骨 P100、N150、P250)方面没有差异。然而,帕金森病患者在观看不愉快的图片时,尤其是与愉快的图片相比,以及与对照组相比,表现出较低的 LPP 幅度,这与之前的研究一致,表明帕金森病患者和健康对照者之间的厌恶处理存在特定差异。重要的是,对于报告高度冷漠的患者,在观看不愉快的图片期间 LPP 幅度最弱。数据表明,PD 中的冷漠可能与防御激活缺陷有关,并且可以使用事件相关电位进行皮质索引。
Parkinson’s disease is associated with emotional changes including depression, apathy, and anxiety. The current study investigated emotional processing in non-demented individuals with Parkinson disease (PD) using an electrophysiological measure, the centro-parietal late positive potential (LPP). Non-demented patients with Parkinson’s disease (n=17) and healthy control participants (n=16) viewed pleasant, neutral, and unpleasant pictures while EEG was recorded from a 64-channel geodesic net. The Parkinson patients did not differ from controls in terms of early electrophysiological components that index perceptual processing (occipital P100, N150, P250). Parkinson patients, however, showed reduced LPP amplitude specifically when viewing unpleasant, compared to pleasant, pictures as well as when compared to controls, consistent with previous studies suggesting a specific difference in aversive processing between PD patients and healthy controls. Importantly, LPP amplitude during unpleasant picture viewing was most attenuated for patients reporting high apathy. The data suggest that apathy in PD may be related to a deficit in defensive activation, and may be indexed cortically using event-related potentials.
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