Individualized brain inhibition and excitation profile in response to paired-pulse TMS.

Individualized brain inhibition and excitation profile in response to paired-pulse TMS.
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DOI:
10.1080/00222895.2013.850401
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发表时间:
2014
影响因子:
1.4
通讯作者:
Hong LE
Hong LE
中科院分区:
心理学4区
文献类型:
--
作者:
Du X;Summerfelt A;Chiappelli J;Holcomb HH;Hong LE

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短间隔皮质内抑制(SICI)和皮质内易化(ICF)是由成对脉冲经颅磁刺激(ppTMS)使用一定的刺激间隔(ISI)产生的。ppTMS提供了一种可访问的技术来评估抑制/易化运动神经回路。然而,SICI和ICF是高度可变的,使得个体变异性不能被任何一个静态ISI捕获。我们假设个体可能具有个体化的和相对稳定的SICI/ICF模式。我们测试了SICI和ICF配置文件使用ISI从1到500毫秒,在2次约3周的时间间隔,和重测信度,在23名健康对照。在具有1和3 ms ISI(SICI)以及具有12、15、18和21 ms ISI(ICF)的ppTMS中发现中度至良好的重测可靠性,但不具有其他对照ISI。在雄性和雌性动物中获得了相似的结果模式。有趣的是,峰值易化、峰值抑制和最大抑制/易化范围是个体化的,使得它们在个体之间变化很大,但在个体内具有高重复性(Cronbach α = 0.76至0.85)。因此,个体似乎具有相对稳定的独特抑制/促进特征。虽然个性化配置文件的功能影响目前尚不清楚,相对稳定的配置文件可能索引潜在的神经抑制和兴奋性状。
Short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF) are generated from paired-pulse transcranial magnetic stimulations (ppTMS) using certain interstimulus intervals (ISIs). ppTMS provides an accessible technique to evaluate inhibitory/facilitatory motor neural circuits. However, SICI and ICF are highly variable such that individual variability is not captured by any one static ISI. We hypothesized that individuals may have individualized and relatively stable pattern of SICI/ICF profiles. We tested SICI and ICF profiles using ISIs from 1 to 500 ms, on 2 occasions about 3 weeks apart, and the test-retest reliability, in 23 healthy controls. Moderate-to-good test-retest reliabilities were found at ppTMS with 1 and 3 ms ISIs (SICI) and with 12, 15, 18 and 21 ms ISIs (ICF), but not with other control ISIs. A similar pattern of results was obtained for males and females. Interestingly, the peak facilitation, peak inhibition and maximum inhibition/facilitation ranges were individualized, such that they varied considerably across individuals but had high repeatability within individual (Cronbach’s alpha = 0.76 to 0.85). Therefore, individuals appear to have unique inhibition/facilitation profiles that are relatively stable. Although the functional implications of individualized profiles are currently unknown, the relatively stable profiles may index underlying neural inhibition and excitation traits.
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