The primary restless legs syndrome pathogenesis depends on the dysfunction of EEG alpha activity.
A dopaminergic drug - lisuride exhibited increase in alpha, decrease in beta and slow activities on brain function measured by computerized EEG. It was postulated that reverse EEG changes might play role in the pathogenesis of RLS. During transition from wakefulness to sleep stage 1 changes in alpha activity initiate long-lasting alpha arousal responses and they continue increasingly at sleep stage 2. This dysfunction is probably due to a genetic vulnerability of EEG alpha rhythm and disinhibits the diencephalospinal dopamine system, mostly during sleep but also during wakefulness. The disinhibition produces background for activation of PLMs, disturbing sensations in brainstem and urge to move, motor restlessness at cerebral cortex, generally for legs. All lead to severe insomnia. In RLS patients, forced deviations from alpha to theta or beta activity are unsuitable and resting EEGs reflect a dopamine receptor-specific 'individual sensitivity.' This vulnerability is alleviated after lisuride with suitable CEEG changes.[1]References
- The primary restless legs syndrome pathogenesis depends on the dysfunction of EEG alpha activity. Akpinar, S. Med. Hypotheses (2003) [Pubmed]
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