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
中科院分区:
文献类型:
--
作者:
Du X;Summerfelt A;Chiappelli J;Holcomb HH;Hong LE
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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影响因子:
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作者:
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