منابع مشابه
Sleep and arousal: thalamocortical mechanisms.
Thalamocortical activity exhibits two distinct states: (a) synchronized rhythmic activity in the form of delta, spindle, and other slow waves during EEG-synchronized sleep and (b) tonic activity during waking and rapid-eye-movement sleep. Spindle waves are generated largely through a cyclical interaction between thalamocortical and thalamic reticular neurons involving both the intrinsic membran...
متن کاملCardiovascular variability after arousal from sleep: time-varying spectral analysis.
We performed time-varying spectral analyses of heart rate variability (HRV) and blood pressure variability (BPV) recorded from 16 normal humans during acoustically induced arousals from sleep. Time-varying autoregressive modeling was employed to estimate the time courses of high-frequency HRV power, low-frequency HRV power, the ratio between low-frequency and high-frequency HRV power, and low-f...
متن کاملArousal from Sleep and Post-event Tachycardia in Osa
881 Arousal and Post-Event Tachycardia—Azarbarzin et al INTRODUCTION Heart rate increases at the end of obstructive events in patients with obstructive sleep apnea (OSA).1-4 In most cases, there is an associated cortical arousal.5-9 Spontaneous arousals (i.e., without OSA) are also associated with an increase in heart rate10-14 Given these observations, the notion that postevent tachycardia is ...
متن کاملVentricular fibrillation occurring on arousal from sleep by auditory stimuli.
A patient is described having syncopal attacks on being awakened from sleep by auditory stimuli. The electrocardiogram registered during these episodes showed Q-Tsegment changes followed by ectopic ventricular activity and spontaneously ending attacks of ventricular fibrillation. Aside from the attacks, her ECG only showed abnormalities of the S-T segment with marked U waves. Hemodynamic and el...
متن کاملSleep after arousal from hibernation is not homeostatically regulated.
Electroencephalographic slow-wave activity (SWA) in non-rapid eye movement (NREM) sleep is directly related to prior sleep/wake history, with high levels of SWA following extended periods of wake. Therefore, SWA has been thought to reflect the level of accumulated sleep need. The discovery that euthermic intervals between hibernation bouts are spent primarily in sleep and that this sleep is cha...
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ژورنال
عنوان ژورنال: Journal of Clinical Sleep Medicine
سال: 2005
ISSN: 1550-9389,1550-9397
DOI: 10.5664/jcsm.26319