Is Deep Brain Stimulation Associated With Detrimental Effects on Cognitive Functions in Patients of Parkinson's Disease? A Systematic Review.

Cureus · 2020 · PMC7486084 · PMID 32923280

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a slight trendno p-value reported

At the same time, while analyzing, we observed a slight trend towards increased adverse outcomes after the surgery and in some probability of psychiatric comorbidities like depression and apathy.

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showed a trendno p-value reported

We included two meta-analyses in this review, and both of them showed a trend towards a decline in verbal fluency [ 26 , 27 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.