Document Detail

Somatosensory evoked high-frequency oscillations in migraine patients.
MedLine Citation:
PMID:  15261864     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To explore additional evidence concerning generators of somatosensory evoked high-frequency oscillations (HFOs). METHODS: We recorded HFOs in migraine patients. Subjects were 19 healthy normal subjects and 19 migraineurs. Electrical stimuli were delivered alternately to the right and left median nerves at their wrists. EEGs were recorded from C3'-Fz, C4'-Fz, Erb1-Erb2, Erb2-Erb1 and Cv6-Fz using a 0.3 Hz low-frequency filter and a 3000 Hz high-frequency filter. Responses to 5000 stimuli were averaged. For separation of HFOs from underlying N20, the digitized wide-band signals were digitally bandpass filtered (400-800 Hz) and averaged. RESULTS: There were no significant differences in peak latencies and amplitudes for N9, N13, N20 and P25 components between normal controls and migraineurs. Root-mean-square amplitudes for HFOs in migraineurs were significantly diminished compared with normal controls. CONCLUSIONS: A diminished inhibitory mechanism in the somatosensory system may exist in migraineurs. It remains to determine what cell populations contribute to generating HFOs. SIGNIFICANCE: This indicates that there is a dysfunction in cortical information processing in the somatosensory cortex of migraineurs.
Kenji Sakuma; Takao Takeshima; Kumiko Ishizaki; Kenji Nakashima
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology     Volume:  115     ISSN:  1388-2457     ISO Abbreviation:  Clin Neurophysiol     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-07-20     Completed Date:  2004-10-05     Revised Date:  2008-09-10    
Medline Journal Info:
Nlm Unique ID:  100883319     Medline TA:  Clin Neurophysiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1857-62     Citation Subset:  IM    
Section of Environment and Health Science, Department of Biological Regulation, School of Health Sciences, Faculty of Medicine, Tottori University, 86 Nishimachi, Yonago, Japan.
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MeSH Terms
Analysis of Variance
Electric Stimulation / methods
Electroencephalography / methods*
Evoked Potentials, Somatosensory / physiology*
Middle Aged
Migraine Disorders / physiopathology*
Somatosensory Cortex / physiology*

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