The Effect of One Night's Sleep Deprivation on Temperature, Mood, and Physical Performance in Subjects with Different Amounts of Habitual Physical Activity

Chronobiology International, Год журнала: 1998, Номер 15(4), С. 349 - 363

Опубликована: Янв. 1, 1998

AbstractEleven healthy males were studied twice. On one occasion (control, C), they slept (night 1) and then underwent a battery of tests at 4h intervals from 06: 00 day 1 to 02: 2; then, after normal sleep 2), tested 10: 22: on 2. the second (sleep deprivation, SD), subjects remained awake during night 1. Each consisted measurements tympanic membrane temperature, profile mood states (POMS), muscle strength, self-chosen work rate (SCWR), perceived exertion, heart (HR) while exercising stationary cycle ergometer. Subjects also kept diary their activities two days answered questionnaire about habitual physical activity. Results showed significant negative effect deprivation most 1, but no other variables. By 2, had tended recover, though strength be worse in both control sleep-deprivation experiments. There was more general tendency for effects present end (02: 00) or beginning 2 (10: 00). limited support view that who habitually active less responded adversely poor achieved university premises 2). These results stress considerable interindividual variation responses loss and, therefore, difficulty associated with giving advice individuals training capability loss.Key Words: Physical performanceExerciseMoodTemperatureSleep

Язык: Английский

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Photoperiodic time measurement in insects and mites: a critical evaluation of the oscillator-clock hypothesis

Journal of Insect Physiology, Год журнала: 2001, Номер 47(10), С. 1097 - 1109

Опубликована: Сен. 1, 2001

Язык: Английский

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Melatonin accelerates maturation inducing hormone (MIH): induced oocyte maturation in carps

General and Comparative Endocrinology, Год журнала: 2004, Номер 140(3), С. 145 - 155

Опубликована: Дек. 22, 2004

Язык: Английский

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Detection and quantification of melatonin in a dinoflagellate, Gonyaulax polyedra: Solutions to the problem of methoxyindole destruction in non‐vertebrate material

Journal of Pineal Research, Год журнала: 1994, Номер 17(1), С. 1 - 10

Опубликована: Авг. 1, 1994

Preservative procedures are described for the extraction and quantification of melatonin in cell material from dinoflagellate Gonyaulax polyedra, an organism which this indoleamine is rapidly degraded due to interaction with free oxygen radicals photooxidation. Cells were shock-frozen liquid nitrogen pulverized. Various methods applied powder, rates recovery compared. For determination by high performance chromatography (HPLC), extractions acetone or perchloric acid more suitable than use other solvents. purposes radioimmunoassay (RIA), gave best results. Several inorganic solvents, often research, such as chloroform, dichloromethane, diethyl ether, led considerable losses indoleamine. The developed HPLC either electrochemical fluorescence detection also allow indolic compounds, particular, tryptophan 5-methoxytryptamine. may be value further search related indoleamines non-vertebrate material, especially, unicells, multicellular plants, invertebrates.

Язык: Английский

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Rest in the scorpion ? a sleep-like state?

Journal of Comparative Physiology A, Год журнала: 1988, Номер 163(2), С. 227 - 235

Опубликована: Янв. 1, 1988

Язык: Английский

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Antioxidative protection in a high‐melatonin organism: The dinoflagellate Gonyaulax polyedra is rescued from lethal oxidative stress by strongly elevated, but physiologically possible concentrations of melatonin

Journal of Pineal Research, Год журнала: 1997, Номер 23(4), С. 182 - 190

Опубликована: Ноя. 1, 1997

Antolín I, Obst B, Burkhardt S, Hardeland R. Antioxidative protection in a high‐melatonin organism: The dinoflagellate Gonyaulax polyedra is rescued from lethal oxidative stress by strongly elevated, but physiologically possible concentrations of melatonin. J. Pineal Res. 1997; 23:182–190. © Munksgaard, Copenhagen Abstract Lethal was investigated the measuring dying‐peak bioluminescence during circadian phases low physiological light emission, capacity, and sensitivity to stimulatory agents. Measurements were carried out constant darkness after transfer cells at CT 6 (circadian time, 0600 hr). H 2 O (0.08 mM), when administered 1 hr cells, led multifold, long‐lasting enhancement which typical for cell damage. At investigation, melatonin did not substantially stimulate up 0.5 mM. this concentration, addition prevented reduced almost basal values. high concentration applied unphysiological , because indoleamine can increase levels several millimolar, e.g., response temperature signals. These protective effects seem be caused mainly direct action as an antioxidant, major enzymes antioxidative stimulated melatonin, although some them responded . activities neither superoxide dismutase, hemoperoxidase/catalase, glutathione peroxidase, nor haloperoxidase enhanced under influence melatonin; 5‐transferase activity increased only slightly.

Язык: Английский

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Ultradian and Orcadian Rhythms of Sleep-Wake and Food-Intake Behavior During Early Infancy

Chronobiology International, Год журнала: 1999, Номер 16(2), С. 129 - 148

Опубликована: Янв. 1, 1999

The early development of sleep-wake and food-intake rhythms in human infants is reviewed. a 24h day-night rhythm contains two observable developmental processes: the alterations periodic structure behavior (decreased ultradian, increased circadian components) process synchronization to external time (entrainment). authors present results their studies involving 26 German children compare them with previous investigations. In research, it became evident that, during first weeks life, pattern characterized by different ultradian periodicities, ranging from 2h 8h. course further ontogenesis, share decreases, while remains dominant for behavior. component established as life increases months that follow. Besides, authors' study supports notion broad interindividual variation rhythm. Examples free-running various are strong indicators endogenous nature show internal clock already functioning at birth. It still uncertain when social cues begins how differences maturation perceptive organs affect importance entrainment. Prepartally, physiological maternal entrainment factors mother-fetus interactions may be most important; gain importance, light acts "zeitgeber" later only.

Язык: Английский

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The circadian system of Drosophila melanogaster and its light input pathways

Zoology, Год журнала: 2002, Номер 105(4), С. 297 - 312

Опубликована: Янв. 1, 2002

Язык: Английский

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Separating the endogenous and exogenous components of the circadian rhythm of body temperature during night work using some ‘purification’ models

Ergonomics, Год журнала: 1993, Номер 36(5), С. 497 - 507

Опубликована: Май 1, 1993

Ten nurses have been studied for a period of about ten days during which they had rest and between two seven successive night shifts. Rectal temperature wrist movement were monitored throughout, the kept an activity log. The process adjustment to work was assessed by comparing shifts in body with those mid-sleep, using mean values as control both cases. When raw data used, measured significantly greater than when first modified or 'purified' series methods that took into account direct effects upon sleep physical activity. 'purification' data--whether profile derived from accelerometer subject's own log--the less rapid did appear be. We conclude conventional measurements rhythm make use over-estimate it due masking effects. suggest also purification we developed can be used field enable estimates made size caused activity, well shift endogenous component circadian rhythm.

Язык: Английский

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Circadian rhythmicity of synapses in mouse somatosensory cortex

European Journal of Neuroscience, Год журнала: 2015, Номер 42(8), С. 2585 - 2594

Опубликована: Авг. 14, 2015

Abstract The circadian rhythmicity displayed by motor behavior of mice: activity at night and rest during the day; associated changes in sensory input are reflected cyclic synaptic plasticity whisker representations located somatosensory (barrel) cortex. It was not clear whether diurnal rhythmic synapse density previously observed barrel cortex resulted from animals, daily light/dark ( LD ) rhythm or driven an endogenous clock. These were investigated C57 BL /6 mouse strain kept under 12 : h conditions constant darkness DD ). Stereological analysis serial electron microscopic sections used to assess numerical synapses. In mice conditions, total synapses excitatory on dendritic spines higher light period (rest phase). contrast, inhibitory increased dark (activity Under upregulation phase retained, but observed. results show that concerns only (and those shafts), differently regulated 24 cycle: influenced light, whilst

Язык: Английский

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