The phrase "a severe sleep" is not commonly used in written English and may sound awkward.
It could be used in a context where one is describing a particularly deep or intense sleep, but it is not a standard expression.
Example: "After the exhausting hike, I fell into a severe sleep and didn't wake up until morning."
Alternatives: "deep sleep" or "profound slumber".
Oltman was later diagnosed with a severe sleep disorder, which causes people to stop breathing repeatedly in their sleep, preventing a restful night.
Discovered by French researchers in the late 1970's, modafinil went on the market in the United States in 1998 as a treatment for narcolepsy, a severe sleep disorder.
On the second night and during the second day, she told me, they slept an average of twelve and a half hours out of a possible sixteen hours of sleep opportunity, demonstrating a severe sleep deficit.
We defined subjects with a score in the highest quartile to have a severe sleep disturbance.
Most psychiatric disorders are typically characterized by a severe sleep disturbance associated with decreased amounts of slow wave sleep (SWS), the physiologically significant, refreshing part of sleep.
Narcolepsy is a severe sleep disorder that is characterized by excessive daytime sleepiness, cataplexies and a tendency towards obesity.
This was dichotomised into no/mild (no sleep problem) versus moderate/severe (sleep problem) because parent perception of a more severe sleep problem is a motivator to seek help, and this dichotomisation is comparable to published cross-sectional and intervention research using the same item.
Overall, migraineurs (probable migraine included) (n = 56) tended to have a higher prevalence of severe sleep disturbances compared with a merged group of all other participants (n = 240) (35.7 vs. 24.6%, P = 0.09).
M. Kevin Howland, who was once on a breathing machine for severe sleep apnea, realized he had to lose weight for his health.
A significant association between severe sleep disturbances and chronic headache [46, 47] and central sensitization [48] has further been reported.
The relationship between migraine and sleep has been reported, and there was a significant association between severe sleep disturbance and primary headache disorder, especially in CM [32].
