Parkinson's disease (PD) is associated with an action language deficit. Subthalamic nucleus deep brain stimulation (STN DBS) deteriorates verbal fluency, but may improve verb naming more than nouns in PD. We investigated effects of grammatical class (verb vs noun), action content (action vs non-action) of words and unilateral, bilateral or no stimulation on naming. Nouns were named more accurately and faster by controls and PD participants; however the noun-verb difference was higher for PD participants. Language, executive and visuospatial function deficits in PD accounted for this difference between PD group and controls. Noun-verb difference was accounted by differences in imageability, familiarity and complexity of the stimuli. Non-action words were named more accurately than action words in the overall sample. Stimulation conditions did not have an effect on naming. This study in Turkish-speaking participants show an action language deficit due to underlying cognitive deficits without an STN DBS effect in PD.

中文翻译：

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丘脑底核深部脑刺激对土耳其语帕金森病患者动名词命名的影响

帕金森病 (PD) 与动作语言缺陷有关。丘脑下核深部脑刺激 (STN DBS) 会降低语言流畅性，但可能比 PD 中的名词更能改善动词命名。我们调查了语法类别（动词与名词）、单词的动作内容（动作与非动作）以及单侧、双侧或无刺激对命名的影响。对照组和 PD 参与者更准确、更快地命名名词；然而，PD 参与者的名词-动词差异更高。PD 的语言、执行和视觉空间功能缺陷导致了 PD 组和对照组之间的这种差异。名词-动词的差异是由刺激的可形象性、熟悉度和复杂性的差异引起的。在整个样本中，非动作词的命名比动作词更准确。刺激条件对命名没有影响。这项在讲土耳其语的参与者中进行的研究表明，由于潜在的认知缺陷，在 PD 中没有 STN DBS 效应，导致行动语言缺陷。