The modulation effect of non-invasive brain stimulation on cognitive function in patients with mild cognitive impairment: a systematic review and meta-analysis of randomized controlled trials.

BMC Neurosci · 2019 · PMC6317253 · PMID 30602377

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slightly significantno p-value reported

Within a specific cognitive domain, NIBS has a slightly significant benefit on executive function and a potentially positive impact on verbal fluency ability.

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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.