Abstract |
In migraineurs nitroglycerin (NTG) induces severe delayed headache, resembling spontaneous migraine attacks. The aim of the present study was to evaluate NTG laser evoked potentials (LEP) features amplitude and pain sensation to laser stimuli during NTG-induced headache. Nine patients were selected. Headache was induced by oral administration of 0.6 mg of NTG; signals were recorded through disk electrodes placed at the vertex and referred to linked earlobes. CO(2)-LEPs delivered by stimulation of the dorsum of both hands and the right and left supraorbital zones were evaluated after the onset of moderate or severe headache resembling spontaneous migraine and at least 72 h after the end of the headache phase. Patients exhibited a significant heat pain threshold reduction and an LEPs amplitude increment during headache when both the supraorbital zones were stimulated. NTG appeared to support a reliable experimental model of migraine, based on the neuronal effects on the integrative-nociceptive structures. The LEPs facilitation during NTG-induced headache may be subtended by a hyperactivity of nociceptive cortex as well as by a failure of pain-inhibitory control.
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Authors | Marina de Tommaso, Giuseppe Libro, Marco Guido, Olimpia Difruscolo, Luciana Losito, Michele Sardaro, Rosanna Cerbo |
Journal | Neuroscience letters
(Neurosci Lett)
Vol. 363
Issue 3
Pg. 272-5
(Jun 17 2004)
ISSN: 0304-3940 [Print] Ireland |
PMID | 15182958
(Publication Type: Comparative Study, Journal Article)
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Chemical References |
- Carbon Dioxide
- Nitroglycerin
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Topics |
- Adult
- Carbon Dioxide
- Evoked Potentials
(drug effects, physiology)
- Female
- Functional Laterality
- Hand
(innervation)
- Headache
(physiopathology)
- Humans
- Lasers
- Male
- Middle Aged
- Migraine Disorders
(chemically induced, physiopathology)
- Nitroglycerin
(adverse effects)
- Pain Measurement
- Pain Threshold
(drug effects, radiation effects)
- Radiation, Nonionizing
- Reaction Time
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