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, somnolency (som'nō-lĕns, -len-sē),
1. An inclination to sleep. Synonym(s): sleepiness
2. A condition of obtusion.
Synonym(s): somnolentia (1)
[L. somnolentia]


Drowsiness, somnolence Sleep disorders Difficulty in maintaining the wakeful state so that the person falls asleep if not actively kept aroused; sleepiness is not simply physical tiredness or listlessness. See Excessive daytime sleepiness.

Patient discussion about sleepiness

Q. I suffer of lack in energy lately, any advice? I’m 35, usually a strong guy but for the past 3 weeks I’ve been sleeping all day, doing nothing while awake, having no energy to do anything. Any one know a reason or what should I do?

A. Have you tried changing your diet? You may lack of vitamins or other essential materials that can cause drowsiness. Try eating vegetables and fruits. Force yourself to do a daily walk, 25 minutes, that’s all. and could be you got an infection that will take some time…

Q. What can cause chronic fatigue? For the last few weeks I’ve been having this strange fatigue, I sleep 12-14 hours at night (I used to sleep 6-7 hours), and I’m tired all day long. It really bothers me. What can is be?

A. Wow, there are so many…to give you a taste- here is a list. I guess some of them you can rule out pretty easily through checking your habits and other symptoms (if you have any):

More discussions about sleepiness
References in periodicals archive ?
Other conditions that can cause excessive sleepiness include neurological disorders such as restless legs syndrome/periodic limb movement disorder, which affects about 2% of the adult population, and conditions such as narcolepsy, affecting one in 2,000 to 3,000 people.
However, daytime sleepiness, measured subjectively using the Epworth Sleepiness Scale and the Karolinska Sleepiness Scale and measured objectively using the Oxford Sleep Resistance test, did not differ significantly between the two study groups.
Moreover, the only E2006 group to show a statistically significant increase compared to placebo in next-day residual sleepiness as measured by the Karolinska Sleepiness Scale (KSS) was at the dose of 25 mg.
Scammell's current research focuses on mouse models of narcolepsy, as mice lacking orexins also experience sleepiness and frequent episodes of cataplexy.
For the study, more than 600 nurses working full-time in critical care units completed a questionnaire on personal and work-related data, sleep quality, daytime sleepiness, sleep quantity, clinical-decision self-efficacy, and decision regret.
Excessive daytime sleepiness is a common symptom for patients with narcolepsy and obstructive sleep apnea (OSA).
University of Michigan Medical School researchers looked at school students who were bullies and found that they faced a two-fold higher risk for symptoms of sleep-disordered breathing, particularly daytime sleepiness.
Of those without clinical vitamin D deficiency, higher levels of daytime sleepiness were significantly correlated with a lower vitamin D concentration.
All study participants completed a series of question-and-answer tests to assess (1) insomnia, (2) daytime sleepiness, (3) depression, and (4) activities of daily living.
The 'epidemic' of sleepiness parallels an 'epidemic' of obesity and psychosocial stress," said Alexandros Vgontzas, MD, the principal investigator for the three studies.
Both are approved by the Food and Drug Administration for the management of persistent sleepiness and fatigue in patients with sleep apnea who are compliant with their CPAP therapy, Dr.
The official said that the main reasons behind losing control over vehicles and going off road during late night is drivers' sleepiness , as some drivers get fatigued because of driving continuously a long time without taking rest.