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偏头痛患者在长时间反转和运动刺激期间视觉诱发电位幅度无衰减。

Lack of visual evoked potentials amplitude decrement during prolonged reversal and motion stimulation in migraineurs.

作者信息

Bednář Michal, Kubová Zuzana, Kremláček Jan

机构信息

Department of Rehabilitation, Charles University in Prague, Faculty of Medicine in Hradec Králové and University Hospital, Hradec Králové, Czech Republic.

Department of Pathological Physiology, Charles University in Prague, Faculty of Medicine in Hradec Králové, Hradec Králové 500 38, Czech Republic.

出版信息

Clin Neurophysiol. 2014 Jun;125(6):1223-30. doi: 10.1016/j.clinph.2013.10.050. Epub 2013 Nov 19.


DOI:10.1016/j.clinph.2013.10.050
PMID:24332446
Abstract

OBJECTIVE: We evaluated response decrement during a short time repetitive low and high contrast reversal and low contrast motion stimulation in controls and migraineurs. METHODS: A total of 39 migraine patients (out of which 19 were in the interictal period and without prophylactic treatment) and 36 healthy volunteers were examined using pattern-reversal (PR-VEP) and motion-onset (M-VEP) visual evoked potentials. Binocular stimulation lasted 2.5 min and the decrement assessment was blinded. RESULTS: Evidence of significant decrement was observed in healthy volunteers for high contrast PR-VEP amplitude of P100-N75 ratios between the fifth and first blocks (0.9; p=0.001) with a linear decline (-0.7 μV/min, p=0.001) and in the P100-N145 amplitude with linear decline (-0.5 μV/min, p=0.004). Significant decrement was also observed for the ratio between the fifth and first block P1-N2 amplitudes in M-VEP (0.9, p=0.006). No significant decrement was noted in the low contrast PR-VEP or among migraineurs. CONCLUSIONS: We confirm differences in decrease of VEPs amplitude during short term examination between controls and migraineurs. We showed the decrement deficit also in the extrastriatal regions of the migraineurs' visual cortex. SIGNIFICANCE: Low contrast and motion-onset stimuli in short time decrement assessment did not increase the test sensitivity.

摘要

目的:我们评估了对照组和偏头痛患者在短时间重复低对比度和高对比度反转以及低对比度运动刺激过程中的反应衰减情况。 方法:共对39例偏头痛患者(其中19例处于发作间期且未接受预防性治疗)和36名健康志愿者进行了模式反转视觉诱发电位(PR-VEP)和运动起始视觉诱发电位(M-VEP)检查。双眼刺激持续2.5分钟,衰减评估采用盲法。 结果:在健康志愿者中,观察到高对比度PR-VEP的P100-N75比值在第五个和第一个刺激块之间有显著衰减(0.9;p=0.001),呈线性下降(-0.7μV/分钟,p=0.001),P100-N145幅值也呈线性下降(-0.5μV/分钟,p=0.004)。M-VEP中第五个和第一个刺激块的P1-N2幅值之比也有显著衰减(0.9,p=0.006)。低对比度PR-VEP或偏头痛患者中未观察到显著衰减。 结论:我们证实了对照组和偏头痛患者在短期检查期间视觉诱发电位幅值下降存在差异。我们还发现偏头痛患者视觉皮层纹外区域也存在衰减缺陷。 意义:在短时间衰减评估中,低对比度和运动起始刺激并未提高检测敏感性。

相似文献

[1]
Lack of visual evoked potentials amplitude decrement during prolonged reversal and motion stimulation in migraineurs.

Clin Neurophysiol. 2014-6

[2]
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[5]
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[10]
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[4]
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[5]
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[6]
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[7]
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[8]
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[9]
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[10]
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