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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Nociceptive temporalis inhibitory reflexes evoked by CO2-laser stimulation in tension-type headache.

The aim of the study was to evaluate the laser-induced suppression periods of the temporalis muscle in patients with tension-type headache, compared with the pattern of temporalis activity suppression induced by electrical stimulation. Fifteen patients with chronic and 10 with episodic tension-type headaches were selected. Suppression periods were recorded simultaneously from both temporalis muscles using both electrical stimuli and CO2-laser stimuli. A significant reduction in the later electrically induced suppression period was found in both tension-type headache groups. Laser stimulation induced a first suppression period (LSP1) with a latency of about 50 ms in all patients. The features of LSP1 were similar across groups. The LSP1 should correspond to the first suppression period induced by electrical stimulus, which is partly a nociceptive response, whereas the second period seemed negligibly linked with the activation of pain-related afferents, though probably their activation may contribute to increase the reflex duration and to emphasize abnormalities in tension-type headache.[1]

References

  1. Nociceptive temporalis inhibitory reflexes evoked by CO2-laser stimulation in tension-type headache. de Tommaso, M., Guido, M., Libro, G., Losito, L., Sciruicchio, V., Specchio, L.M., Puca, F. Cephalalgia : an international journal of headache. (2003) [Pubmed]
 
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