Phosphene and motor transcranial magnetic stimulation thresholds are correlated: A meta-analytic investigation

磷酚 磁刺激 神经科学 运动皮层 经颅交流电刺激 相关性 心理学 视皮层 皮质(解剖学) 度量(数据仓库) 初级运动皮层 刺激 计算机科学 数学 数据挖掘 几何学
作者
Phivos Phylactou,Thao N.D. Pham,N. Narskhani,Nafisa Diya,David A. Seminowicz,Siobhan M Schabrun
出处
期刊:Progress in Neuro-psychopharmacology & Biological Psychiatry [Elsevier BV]
卷期号:: 111020-111020
标识
DOI:10.1016/j.pnpbp.2024.111020
摘要

Transcranial magnetic stimulation (TMS) is commonly delivered at an intensity defined by the resting motor threshold (rMT), which is thought to represent cortical excitability, even if the TMS target area falls outside of the motor cortex. This approach rests on the assumption that cortical excitability, as measured through the motor cortex, represents a 'global' measure of excitability. Another common approach to measure cortical excitability relies on the phosphene threshold (PT), measured through the visual cortex of the brain. However, it remains unclear whether either estimate can serve as a singular measure to infer cortical excitability across different brain regions. If PT and rMT can indeed be used to infer cortical excitability across brain regions, they should be correlated. To test this, we systematically identified previous studies that measured PT and rMT to calculate an overall correlation between the two estimates. Our results, based on 16 effect sizes from eight studies, indicated that PT and rMT are correlated (ρ = 0.4), and thus one measure could potentially serve as a measure to infer cortical excitability across brain regions. Three exploratory meta-analyses revealed that the strength of the correlation is affected by different methodologies, and that PT intensities are higher than rMT. Evidence for a PT-rMT correlation remained robust across all analyses. Further research is necessary for an in-depth understanding of how cortical excitability is reflected through TMS.
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