Dynamic changes in thalamic microstructure of migraine without aura patients: a diffusion tensor magnetic resonance imaging study
Version of Record online: 7 NOV 2013
© 2013 The Author(s) European Journal of Neurology © 2013 EFNS
European Journal of Neurology
Volume 21, Issue 2, pages 287–e13, February 2014
How to Cite
Coppola, G., Tinelli, E., Lepre, C., Iacovelli, E., Di Lorenzo, C., Di Lorenzo, G., Serrao, M., Pauri, F., Fiermonte, G., Bianco, F. and Pierelli, F. (2014), Dynamic changes in thalamic microstructure of migraine without aura patients: a diffusion tensor magnetic resonance imaging study. European Journal of Neurology, 21: 287–e13. doi: 10.1111/ene.12296
- Issue online: 13 JAN 2014
- Version of Record online: 7 NOV 2013
- Manuscript Accepted: 23 SEP 2013
- Manuscript Received: 25 JUN 2013
- diffusion tensor magnetic resonance imaging;
- fractional anisotropy;
Background and purpose
The thalamus seems to be profoundly involved in the cyclical recurrence of migraine clinical and neurophysiological features. Here possible structural changes in the thalamus of migraineurs were searched for by means of diffusion tensor (DT) magnetic resonance imaging (MRI). This MRI technique provides quantitative data on water molecule motion as a marker of tissue microstructure.
Twenty-four untreated migraine without aura (MO) patients underwent DT-MRI scans (3-T Siemens Gyroscan) during (n = 10) and between attacks (n = 14) and were compared with a group of 15 healthy volunteers (HVs). Fractional anisotropy (FA) and mean diffusivity (MD) were examined.
During the interictal phase MO patients had a significantly higher FA and slightly lower MD values in bilateral thalami compared with HVs. During attacks, all MRI quantitative measurements in migraineurs were similar to those found in HVs. Right thalamic FA was positively correlated with the number of days since the last migraine attack in pooled patient data (r = 0.626, P = 0.003).
These higher thalamic FA values noted during the interictal period which normalized during an attack are probably related to plastic peri-ictal modifications in regional branching and crossing of fibres. Whether these changes could be considered as the anatomical counterpart of the cyclical functional fluctuations previously observed in the neurophysiology of migraine remains to be determined.