![]() This is a laborious process, as the data is huge: an 8-h sleep record sampled at 200 Hz with 13 different physiological measurements contains a total of 75 million data points. Currently, sleep arousals are labeled through visual inspection of polysomnographic recordings according to the American Academy of Sleep Medicine (AASM) scoring manual 10. These arousals result from different types of potential stimuli, for example obstructive sleep apneas or hypopneas, snoring, or external noises. However, excessive arousals can lead to fragmented sleep or daytime sleepiness 2. Spontaneous sleep arousals, defined as brief intrusions of wakefulness into sleep 9, are a common characteristic of brain activity during sleep. It is estimated that around one-third of the general population in the United States are affected by insufficient sleep 8. Inadequate sleep is often associated with negative outcomes, including obesity 2, irritability 2, 3, cardiovascular dysfunction 4, hypotension 5, impaired memory 6 and depression 7. Sleep is important for our health and quality of life 1. This computational tool would greatly empower the scoring process in clinical settings and accelerate studies on the impact of arousals. Our algorithm enables fast and accurate delineation of sleep arousal events at the speed of 10 seconds per sleep recording. We created an augmentation strategy by randomly swapping similar physiological channels, which notably improved the prediction accuracy. Leveraging a specific architecture that ‘translates’ input polysomnographic signals to sleep arousal labels, this algorithm ranked first in the “You Snooze, You Win” PhysioNet Challenge. Here we present a deep learning approach for automatically segmenting sleep arousal regions based on polysomnographic recordings. Currently, sleep arousals are mainly annotated by human experts through looking at 30-second epochs (recorded pages) manually, which requires considerable time and effort. ![]() ![]() Excessive sleep arousals are associated with symptoms such as sympathetic activation, non-restorative sleep, and daytime sleepiness. "The longer you spend in deeper sleep, the more refreshed you'll feel in the morning," she says.Sleep arousals are transient periods of wakefulness punctuated into sleep. But, in general, people alternate among several different levels of non-REM and REM sleep every night. Krahn says not everyone goes through all of the stages. "They're paralyzed, and that's actually felt probably to be a rinsing function - to clear the brain of toxins and byproducts that have collected during the waking day."ĭr. "Things speed up except a person cannot move," says Dr. ![]() The final stage is REM sleep, which is typically when you dream. "And that just allows the body a chance to recover from the busy day." "When we're in deep sleep, our heart rate and our breathing really slows down," says Dr. Krahn says the three types of non-REM, which stands for rapid eye movement, include level one, which is light sleep level two, intermediate sleep and level three, deep sleep. ![]() Lois Krahn, a Mayo Clinic sleep medicine specialist.ĭr. "We basically divide sleep into wake, non-REM - three types - and REM sleep," says Dr. When your head hits the pillow, your body can go through several stages of sleep. Journalists: Broadcast-quality video pkg (1:00) is in the downloads. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |