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The Journal of Headache and Pain

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Open Access 01-12-2014 | Short report

Magnetic suppression of perceptual accuracy is not reduced in episodic migraine without aura

Authors: Veronika Rauschel, Ruth Ruscheweyh, Thomas Eggert, Andreas Straube

Published in: The Journal of Headache and Pain | Issue 1/2014

Abstract

Background

Altered cortical excitability is thought to be part of migraine pathophysiology. Reduced magnetic suppression of perceptual accuracy (MSPA) has been found in episodic migraine with aura and in chronic migraine, and has been interpreted as reduced inhibition of the occipital cortex in these migraine subtypes. Results are less clear for episodic migraine without aura. In the present study we compared MSPA between 24 healthy controls and 22 interictally measured episodic migraine patients without aura. In addition, we investigated test-retest reliability in 33 subjects (24 controls, 9 migraine).

Findings

Visual accuracy was assessed by letter recognition and modulated by transcranial magnetic stimulation delivered to the occipital cortex at different intervals to the letter presentation (40, 100 and 190 ms). The results confirm suppression of visual accuracy at the 100 ms interval (p < 0.001), but there were no significant group differences (percentage of correctly recognized letters, control: 36.1 ± 36.2; migraine: 44.0 ± 32.3, p = 0.44). Controls and migraine patients were pooled for assessment of test-retest reliability (n = 33). Levels of suppression at 100 ms were similar at test (percentage of correctly recognized letters: 42.3 ± 32.6) and retest (41.9 ± 33.8, p = 0.90) and test-retest correlations were good (r = 0.82, p < 0.001).

Conclusions

The results demonstrate that occipital cortex inhibition as assessed with MSPA is not reduced in episodic migraine without aura. This suggests a larger role of occipital cortex excitability in episodic migraine with aura and in chronic migraine compared to episodic migraine without aura. Test-retest reliability of MSPA was good.

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Title: Magnetic suppression of perceptual accuracy is not reduced in episodic migraine without aura
Authors: Veronika Rauschel
Ruth Ruscheweyh
Thomas Eggert
Andreas Straube
Publication date: 01-12-2014
Publisher: Springer Milan
Published in: The Journal of Headache and Pain / Issue 1/2014
Print ISSN: 1129-2369
Electronic ISSN: 1129-2377
DOI: https://doi.org/10.1186/1129-2377-15-83

ACC 2024 Congress

Springer Medicine

Magnetic suppression of perceptual accuracy is not reduced in episodic migraine without aura

Abstract

Background

Findings

Conclusions

ACC 2024 Congress

Springer Medicine

Abstract

Background

Findings

Conclusions

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