Cognitive evoked potentials in obstructive sleep apnea syndrome: a review of the literature

2012 ◽  
Vol 23 (3) ◽  
Author(s):  
Alberto Raggi ◽  
Raffaele Ferri
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Evoked Potentials ◽  
Obstructive Sleep Apnea Syndrome ◽  
Sleep Apnea Syndrome ◽  
Review Of The Literature ◽  
Cognitive Evoked Potentials ◽  
Obstructive Sleep ◽  
Apnea Syndrome

Reduced respiratory-related evoked activity in subjects with obstructive sleep apnea syndrome

2003 ◽  
Vol 94 (2) ◽  
pp. 429-438 ◽  
Author(s):  
Metin Akay ◽  
J. C. Leiter ◽  
J. Andrew Daubenspeck
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Evoked Potentials ◽  
Obstructive Sleep Apnea Syndrome ◽  
Sleep Apnea Syndrome ◽  
Upper Airway ◽  
Normal Subjects ◽  
Global Field Power ◽  
Obstructive Sleep ◽  
Apnea Syndrome

Midlatency respiratory-related evoked potentials were measured during wakefulness by using a 60-electrode array placed over the cortical region of the scalp. We studied the responses evoked by 200-ms pressure pulses at −5 and −10 cmH2O applied at inspiratory onset and during control tests (no pressure applied) in 14 subjects with obstructive sleep apnea syndrome (OSAS) and 18 normal subjects. Wavelet decomposition was used to smooth and dissect the respiratory-related evoked potentials in frequency and time in 8 frequency bands. After denoising, selected wavelet scales were used to reconstruct the respiratory-related evoked potentials, which were quantified by using global field power estimates. The time course of the global field power activity in OSAS subjects compared with normal subjects was significantly depressed in the period 55–70 ms poststimulus onset, a time when afferent traffic from upper airway receptors arrives in normal subjects. The reduced evoked response in subjects with OSAS suggests that these subjects receive less afferent input from upper airway mechanoreceptors. This may reflect reduced sensitivity of mechanoreceptors or reduced mechanoreceptor stimulation due to decreased upper airway compliance during wakefulness in OSAS.

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