Cortical Inhibition Is Reduced in Chronic and Episodic Migraine and Demonstrates a Spectrum of Illness
- 1 May 2005
- journal article
- research article
- Published by Wiley in Headache: The Journal of Head and Face Pain
- Vol. 45 (5), 546-552
- https://doi.org/10.1111/j.1526-4610.2005.05108.x
Abstract
Background.- The pathophysiological relationship between episodic migraine a nd chronic migraine is not fully understood. We aimed to examine transcranial ma gnetic stimulation (TMS) indices of cortical excitability in patients with episo dic migraine (EM) and probable chronic migraine (PCM), and matched controls. Met hods.- Cortical excitability was assessed at baseline with two well- establish ed methods: phosphene thresholds (PT) and magnetic suppression of perceptual acc uracy (MSPA)- profiles. Five EM patients, five PCM patients, and five normal co ntrols participated in the main study. In addition, two patients were reassessed after 30 days of treatment with topiramate. Results.- Both PT and MPSA measure s were consistent in indicating a continuum of excitability across the three gro ups: PCM patients had the highest excitability, followed by EM, then controls. I n the two treated patients MPSA profiles appeared to normalize at a 100 mg dosag e. Conclusions.- Patients with PCM appear to be characterized by very high cort ical excitability. This may contribute to their greatly increased attack frequen cy. TMS- based methods will be important for future research examining the evol ution of chronic migraine from episodic migraine over time.Keywords
This publication has 22 references indexed in Scilit:
- Controversies in HeadacheCephalalgia, 2004
- Consecutive Transcranial Magnetic Stimulation: Phosphene Thresholds in Migraineurs and ControlsHeadache: The Journal of Head and Face Pain, 2004
- Platform PresentationsCephalalgia, 2002
- Periaqueductal Gray Matter Dysfunction in Migraine: Cause or the Burden of Illness?Headache: The Journal of Head and Face Pain, 2001
- Chronic daily headacheCurrent Opinion in Neurology, 2000
- Correlation of Optotypes with the Landolt Ring???A Fresh Look at the Comparability of OptotypesOptometry and Vision Science, 1994
- Classification of Daily and Near‐Daily Headaches: Proposed Revisions to the IHS CriteriaHeadache: The Journal of Head and Face Pain, 1994
- Glasgow Acuity Cards: a new test for the measurement of letter acuity in childrenOphthalmic and Physiological Optics, 1993
- Headache Caused by a Single Lesion of Multiple Sclerosis in the Periaqueductal Gray AreaHeadache: The Journal of Head and Face Pain, 1993
- The effectiveness of cerebral imaging in the diagnosis of chronic headacheArchives of Internal Medicine, 1992