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논문 기본 정보

자료유형
학술저널
저자정보
Hatice Yuksel (Ankara City Hospital) Kamil Kadir Topalkara (Bayindir Kavaklidere Hospital)
저널정보
대한신경과학회 Journal of Clinical Neurology Journal of Clinical Neurology 제17권 제2호
발행연도
2021.1
수록면
236 - 241 (6page)

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Background and Purpose The cerebral cortex has been the focus of investigations of the pathogenesis of migraine for a long time. Transcranial magnetic stimulation (TMS) is a safe and effective technique for evaluating cortex excitability. Previous studies of the duration of the cortical silent period (CSP)?a measure of intracortical inhibition?in migraine patients have yielded conflicting results. We aimed to characterize cortical excitability by applying TMS to female migraineurs during the preovulatory phase of the menstrual cycle, in order to eliminate the effects of variations in sex hormones. Methods We enrolled 70 female subjects: 20 migraine with aura (MA) patients, 20 migraine without aura (MO) patients, and 30 healthy controls. We measured the CSP, resting motor threshold (rMT), and motor evoked potential (MEP) induced by TMS to evaluate cortical excitability during the preovulatory phase of the menstrual cycle. Results The CSP was shorter in MA patients (88.93±3.82 ms, mean±SEM) and MO patients (86.98±2.72 ms) than in the control group (109.06±2.85 ms) (both p=0.001), and did not differ significantly between the MA and MO groups (p=0.925). The rMT did not differ significantly among the groups (p=0.088). MEPmax was higher in MA patients than in healthy controls (p=0.014), while that in MO patients did not differ from those in MA patients and healthy controls (p=0.079 and p=0.068). Conclusions We detected a shorter CSP in both MA and MO patients. This finding may indicate the presence of motor cortex hyperexcitability, which is probably due to reduced GABAergic neuronal inhibition in migraine.

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