Why the study?
What are the polysomnographic sleep characteristics in patients with post-polio syndrome complaining of sleep disturbances?
What are the polysomnographic sleep characteristics in patients with post-polio syndrome complaining of sleep disturbances?
Post-polio syndrome patients with sleep complaints exhibit impaired sleep efficiency and architecture, higher AHI, and higher PLM indices, which may be related to brainstem motor neuron dysfunction rather than primary respiratory failure.
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May warrant polysomnography in symptomatic post-polio syndrome; leaves open brainstem mechanisms beyond respiratory failure.
UNLABELLED: The main post-polio syndrome (PPS) symptoms are new weakness, new atrophy, fatigue, pain and sleep disturbances. Polysomnography is the gold standard for sleep analysis. OBJECTIVE: To analyze sleep patterns in PPS patients. METHOD: Sixty patients (mean age 46.8+/-11.3 years) at the Federal University of São Paulo (UNIFESP/EPM) complaining of sleep disturbances were evaluated by means of polysomnography, performed at the Sleep Institute. RESULTS: Sleep efficiency was lower due to high sleep latency and arousal index. The apnea and hypopnea index (AHI) and the periodic limb movements (PLM) index were higher. Sleep architecture was also impaired. There were no abnormalities of oxygen saturation, carbon dioxide levels, respiratory rate or heart rate. CONCLUSION: New post-polio sleep disturbances were isolated symptoms. It appears that these symptoms were not due to post-polio features, but rather, that they were due to dysfunction of the surviving motor neurons in the brainstem. Abnormal dopamine production, which is responsible for many sleep-related breathing disorders and abnormal movements, may also have been implicated in the present findings.
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Silva et al. (2010) studied this question.
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