Vigilance stages and performance in OSAS patients in a monotonous reaction time task

• Published in: Clinical neurophysiology 2000-06, Vol.111 (6), p.1130-1136
• Main Authors: KINNARI, K, PETER, J. H, PIETARINEN, A, GROETE, L, PENZEL, T, VÄRRI, A, LAIPPALA, P, SAASTAMOINEN, A, CASSEL, W, HASAN, J
• Format: Article
• Language: English
• Subjects: Adult; Aged; Arousal - physiology; Biological and medical sciences; Body Mass Index; Choice Behavior; Disorders of higher nervous function. Focal brain diseases. Central vestibular syndrome and deafness. Brain stem syndromes; Electroencephalography; Electromyography; Electrooculography; Eye Movements - physiology; Humans; Male; Medical sciences; Middle Aged; Nervous system (semeiology, syndromes); Neurology; Polysomnography; Psychomotor Performance - physiology; Reaction Time - physiology; Sleep Apnea Syndromes - physiopathology
• ISSN: 1388-2457; 1872-8952
• DOI: 10.1016/S1388-2457(00)00269-8

To develop improved methods for objective assessment of daytime vigilance. This is important in the diagnosis and therapy control of sleep disorders associated with excessive daytime sleepiness (EDS). Twenty-one patients with EDS due to obstructive sleep apnea were recorded during a daytime 90 min reaction time (RT) test in a monotonous situation. Two EEG, two EOG and a submental EMG channel were recorded simultaneously. The recordings were divided into short, stationary segments of variable length (0.5-2 s) and classified into 7 stages using our previously described system, which includes additional stages for drowsiness. The duration of RT was linearly correlated to the vigilance state (P