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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]
Farlex Partner Medical Dictionary © Farlex 2012


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.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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
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References in periodicals archive ?
Ancelin et al., "Insomnia, daytime sleepiness and cardio-cerebrovascular diseases in the elderly: a 6-year prospective study," PLoS One, vol.
Repeated measures of finger dexterity and sleepiness were done at fixed intervals of 0, 6, 12, 18, and 24 h of SD.
The use of the scale had been practice beforehand and consisted of the following scores: 1 = extremely alert, 2 = very alert, 3 = alert, 4 = rather alert, 5 = neither alert or sleepy, 6 = some sign of sleepiness, 7 = sleepy, but no effort to stay awake, 8 = sleepy, some effort to stay awake, 9 = very sleepy, great effort to stay awake[13].
Therefore, the purpose of this study was to assess the prevalence of excessive daytime sleepiness (EDS) measured by the Epworth Sleepiness Scale (ESS) among academic physicians at a tertiary academic medical center in an urban area in the northwest region of Turkey, and to establish the relationship between the self-perceived sleepiness and the quality of life using the EuroQol-5 dimensions (EQ-5D).
Poor sleep quality was associated with female gender (p less than 0.05), excessive daytime sleepiness (p less than 0.05), total hours slept (p less than 0.001) and sleep disturbances (p less than 0.001).
A score greater than 10 on the Epworth Sleepiness Scale (ESS), or a mean sleep latency less than eight minutes on the Multiple Sleep Latency Test (MSLT) (30,41,42) is considered inappropriate sleepiness during waking hours and has been under-recognized in PD.
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.
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.
Sleep apnea tends to produce excessive daytime sleepiness but this study recruited patients with insomnia, and most with insomnia don't have sleep apnea, rather issues like anxiety, stress and depression and so other emotional and psychological factors are more likely interfering with their sleep.
Health care utilization was not significantly predicted by sleepiness. Higher disability, pain intensity, and presence of a sleep disorder were associated with higher predicted visits and costs for LBP.
To probe for the culprit of daytime sleepiness, actigraphy wrist monitoring was performed and showed no persistent insomnia or circadian rhythm disturbances.
Approval was based on results from TONES (Treatment of Obstructive Sleep Apnea and Narcolepsy Excessive Sleepiness), a phase 3 study that combined four randomized, placebo-controlled trials assessing solriamfetol at various doses, compared with a placebo.