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  2. Is Waking Up in the Middle of the Night Normal? Here's What ...

    www.aol.com/waking-middle-night-normal-heres...

    While a full night of uninterrupted sleep is the goal for many, it’s not uncommon to wake up at least once in the middle of the night. In fact, most people wake up two to three times throughout ...

  3. Nocturnal penile tumescence - Wikipedia

    en.wikipedia.org/wiki/Nocturnal_penile_tumescence

    In a study published in 1972, [11] during puberty, the average tumescence time per night was 159 min; average REM sleep time was 137 min. Average simultaneous REM sleep and penile tumescence per night was 102 min. Study subjects averaged 6.85 tumescence episodes/night, and, of these, 5.15 occurred during a REM sleep period. Tumescence episodes ...

  4. Why do I wake up at 3 a.m. every night? - AOL

    www.aol.com/keep-waking-middle-night-could...

    Why you might be waking up. Sleep architecture refers to the four stages of sleep people cycle through during the night in about 90 to 120-minute intervals, said Dr. Brandon Peters-Mathews, a ...

  5. Waking at the same time each night reveals details ... - AOL

    www.aol.com/article/2016/07/14/waking-at-the...

    Waking up during these times could mean that something needs to be confronted. 11pm - 1am: Gall Bladder ... Casper beds and mattresses are the perfect fit for everyone and can help you sleep ...

  6. Hypnic jerk - Wikipedia

    en.wikipedia.org/wiki/Hypnic_jerk

    A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.

  7. Circadian rhythm sleep disorder - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm_sleep...

    Irregular sleepwake rhythm disorder (ISWRD) is characterized by a normal 24 h sleeping period. However, individuals with this disorder experience fragmented and highly disorganized sleep that can manifest in the form of waking frequently during the night and taking naps during the day, yet still maintaining sufficient total time asleep.

  8. How to Get Back to Sleep After Waking Up at Night - AOL

    www.aol.com/back-sleep-waking-night-160332950.html

    Signs of obstructive sleep apnea include snoring and waking up gasping. ... Many people who wake up at night head to the kitchen for a middle-of-the-night munch, but Schneeberg warns against doing ...

  9. Hypersomnia - Wikipedia

    en.wikipedia.org/wiki/Hypersomnia

    [9] [10] It is a difficulty transitioning from sleep to wake. [10] Individuals experiencing sleep drunkenness report waking with confusion, disorientation, slowness and repeated returns to sleep. [9] [11] It also appears in non-hypersomniac persons, for example after a night of insufficient sleep. [9]