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Sleepiness Process

For modestly viscous oils—those having viscosities of approximately 20-100 centipoise (cP)-water-soluble polymers such as polyacrylamides or xanthan gum have been used to increase the viscosity of toe water injected to displace oil from toe formation. For example, polyacrylamide was added to water used to waterflood a 24 cP oil in toe Sleepy Hollow Field in Nebraska. Polyacrylamide was also used to viscosify water used to flood a 40 cP oil in the Chateaurenard Field, France. With this process, toe polymer is dissolved in toe water, increasing its viscosity. [Pg.201]

The patient experiences anxiety, apathy, bradyphrenia (slowness of thought processes), confusional state, dementia, depression, hallucinosis/psychosis (typically drug-induced), and sleep disorders (excessive daytime sleepiness, insomnia, obstructive sleep apnea, and rapid eye movement sleep behavior disorder). [Pg.643]

This process is further favored by biasing the internal expectancy set as, for example, when the subject is not only sleepy but apprehensive. Conscious efforts to maintain vigilance, even under strenuous conditions, may be unavailing because of internal expectancy (let s call it priming) if the perceptual apparatus becomes both a motive force and a shaper of false perception. [Pg.154]

Changes in performance capability during continuous wakefulness can be conceptualized as a two-process interaction (33), derived from the two-process model of sleep regulation (54). Specifically, sleepiness and performance are influenced by the homeostatic sleep drive (producing monotonic increases in impairment) and by circadian rhythmicity (near 24-hr cycles) (33,58). Daily circadian modulation of neurocognitive performance has been consistently noted since the first studies of sleep deprivation and human performance (2,13). [Pg.54]

We are using the term inadequate sleep instead of sleep deprivation in our title for a number of reasons. First, few studies have aimed specifically to deprive children or adolescents of sleep. We describe some research on experimental sleep restriction in children but most of these studies fall far short of common deprivation paradigms in animals or even adult humans. Instead, most research in younger humans has assessed outcome measures such as school grades, self-reported sleepiness, and so forth as a function of variations in self-selected or usual sleep patterns with the expectation that children and adolescents who obtain lower than normal amounts of sleep will manifest deficits. Thus, inadequate sleep is defined by sleep characteristics of a sample. We also wanted to note some of the literature on sleep that is disturbed or disrupted due to disease processes such as apnea or periodic leg movements the duration of sleep in sleep disorders may or may not be shortened or restricted although it is likely fragmented and otherwise abnormal. We decided on the term inadequate sleep with the hope that it would encompass these different areas of concern. [Pg.151]

The results from the studies described above indicate that the MSLT provides a robust measure of sleepiness that is sensitive to sleep restriction in children and adolescents (112). Patterns of sleep latency from repeated naps during constant routine protocols or forced desynchrony protocols in older children and adolescents also illustrate the influences of both homeostatic and circadian processes on sleepiness/alertness and provide evidence for the hypothesis that... [Pg.166]

Folkard S, Akerstedt T. A three-process model of the regulation of alertness-sleepiness. In Broughton RJ, Ogilvie RD, eds. Sleep, Arousal, and Performance. Boston Birkhauser, 1992 11-26. [Pg.472]

The word narcolepsy refers to a syndrome of unknown origin that is characterized by abnormal sleep tendencies, including excessive daytime sleepiness and often disturbed nocturnal sleep and pathological manifestations of REM sleep. The REM sleep abnormalities include sleep onset REM periods and the dissociated REM sleep inhibitory processes, cataplexy and sleep paralysis. Excessive daytime sleepiness, cataplexy, and less often sleep paralysis and hypnagogic hallucinations are the major symptoms of the disease [12]. [Pg.43]

Q2 In addition to poor memory, factors which suggest a diagnosis of hypothyroidism include cold intolerance, cold extremities, slowed reflexes, low resting heart rate, slow thought processes, depression and sleepiness/lack of energy, appetite suppression associated with weight gain and raised blood lipids, which may lead to increased atherosclerosis. [Pg.146]

Carbohydrates can increase serotonin levels and cause sleepiness. Insulin swings can provoke mood swings. High insulin levels increase fat storage which can cause bloating, and water retention. Often, protein supplements are needed for the bodybuilder. Low-fat foods are often much more expensive than the conventional version, and contain more "chemistry" i.e. are highly processed. [Pg.14]


See other pages where Sleepiness Process is mentioned: [Pg.370]    [Pg.29]    [Pg.291]    [Pg.422]    [Pg.14]    [Pg.293]    [Pg.358]    [Pg.135]    [Pg.78]    [Pg.14]    [Pg.55]    [Pg.156]    [Pg.164]    [Pg.335]    [Pg.449]    [Pg.463]    [Pg.476]    [Pg.545]    [Pg.559]    [Pg.415]    [Pg.370]    [Pg.135]    [Pg.193]    [Pg.82]    [Pg.49]    [Pg.2041]    [Pg.168]    [Pg.18]    [Pg.79]    [Pg.71]    [Pg.893]    [Pg.740]    [Pg.48]    [Pg.277]    [Pg.501]    [Pg.129]   
See also in sourсe #XX -- [ Pg.463 ]




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Sleepiness

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