Multilevel somatosensory system disinhibition in children with migraine

Research output: Contribution to journalArticlepeer-review

Abstract

Although migraine is characterised by an abnormal cortical excitability level, whether the central nervous system is hyper- or hypo-excitable in migraine still remains an unsolved problem. The aim of our study was to compare the somatosensory evoked potential (SEP) recovery cycle, a marker of the somatosensory system's excitability, in a group of 15 children suffering from migraine without aura (MO) (mean age 11.7±1.6 years, five males, 10 females) and 10 control age-matched subjects (CS) (mean age 10.9±2.1 years, six males, four females). We calculated the SEP's latency and amplitude modifications after paired electrical stimuli at 5, 20 and 40 ms interstimulus intervals (ISIs), comparing it with a single stimulus condition assumed as the baseline. In MO patients, the amplitudes of the cervical N13 and of the cortical N20, P24 and N30 responses at 20 and 40 ms ISIs showed a higher recovery than in CS (two-way ANOVA, P+, therefore, the shortened recovery cycle in our MO patients suggests a high level of intracellular Na+ and a consequent depolarized resting membrane potential, possibly due to an impaired Na +-K+ ATPase function in migraine.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalPain
Volume118
Issue number1-2
DOIs
Publication statusPublished - Nov 2005

Keywords

  • Children
  • Human brain
  • Migraine
  • Pain
  • Somatosensory evoked potentials

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health
  • Neuroscience(all)
  • Neurology
  • Pharmacology
  • Clinical Psychology

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