Search Results - "Eastman, Charmane I"

Sex and ancestry determine the free‐running circadian period by Eastman, Charmane I., Tomaka, Victoria A., Crowley, Stephanie J.

“…Summary The endogenous, free‐running circadian period (τ) determines the phase relationship that an organism assumes when entrained to the 24‐h day. We found a…”
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A three pulse phase response curve to three milligrams of melatonin in humans by Burgess, Helen J., Revell, Victoria L., Eastman, Charmane I.

“…Exogenous melatonin is increasingly used for its phase shifting and soporific effects. We generated a three pulse phase response curve (PRC) to exogenous…”
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Circadian Phase Advances in Response to Weekend Morning Light in Adolescents With Short Sleep and Late Bedtimes on School Nights by Misiunaite, Ieva, Eastman, Charmane I, Crowley, Stephanie J

“…Many adolescents fall asleep too late to get enough sleep (8-10 h) on school nights. Morning bright light advances circadian rhythms and could help adolescents…”
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Blacks (African Americans) have shorter free-running circadian periods than whites (Caucasian Americans) by Eastman, Charmane I, Molina, Thomas A, Dziepak, Marissa E, Smith, Mark R

“…The length of the free-running period (τ) affects how an animal re-entrains after phase shifts of the light-dark (LD) cycle. Those with shorter periods adapt…”
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Phase advancing the human circadian clock with blue-enriched polychromatic light by Smith, Mark R, Revell, Victoria L, Eastman, Charmane I

“…Abstract Background Previous studies have shown that the human circadian system is maximally sensitive to short-wavelength (blue) light. Whether this…”
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Sleep and cognitive performance of African-Americans and European-Americans before and during circadian misalignment produced by an abrupt 9-h delay in the sleep/wake schedule by Paech, Gemma M, Crowley, Stephanie J, Eastman, Charmane I

“…We conducted two studies of circadian misalignment in non-Hispanic African and European-Americans. In the first, the sleep/wake (light/dark) schedule was…”
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Advancing the sleep/wake schedule impacts the sleep of African-Americans more than European-Americans by Paech, Gemma M, Crowley, Stephanie J, Fogg, Louis F, Eastman, Charmane I

“…There are differences in sleep duration between Blacks/African-Americans and Whites/European-Americans. Recently, we found differences between these ancestry…”
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Practical Interventions to Promote Circadian Adaptation to Permanent Night Shift Work: Study 4 by Smith, Mark R, Fogg, Louis F, Eastman, Charmane I

“…Scheduled bright light and darkness can phase shift the circadian clocks of night workers for complete adaptation to a night work, day sleep schedule, but few…”
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Racial differences in the human endogenous circadian period by Smith, Mark R, Burgess, Helen J, Fogg, Louis F, Eastman, Charmane I

“…The length of the endogenous period of the human circadian clock (tau) is slightly greater than 24 hours. There are individual differences in tau, which…”
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The dim light melatonin onset following fixed and free sleep schedules by BURGESS, HELEN J., EASTMAN, CHARMANE I.

“…Summary The time at which the dim light melatonin onset (DLMO) occurs can be used to ensure the correct timing of light and/or melatonin administration in…”
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The effects of prior light history on the suppression of melatonin by light in humans by Hébert, Marc, Martin, Stacia K., Lee, Clara, Eastman, Charmane I.

“…: We investigated the impact of light exposure history on light sensitivity in humans, as assessed by the magnitude of the suppression of melatonin secretion…”
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How to Travel the World Without Jet Lag by Eastman, Charmane I., PhD, Burgess, Helen J., PhD

“…This article describes in detail how melatonin, bright light, and sleep schedules can be used in conjunction with currently available flight times to reduce or…”
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Bright light, dark and melatonin can promote circadian adaptation in night shift workers by Burgess, Helen J., Sharkey, Katherine M., Eastman, Charmane I.

“…The circadian rhythms of shift workers do not usually phase shift to adapt to working at night and sleeping during the day. This misalignment results in a…”
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Combinations of Bright Light, Scheduled Dark, Sunglasses, and Melatonin to Facilitate Circadian Entrainment to Night Shift Work by Crowley, Stephanie J., Lee, Clara, Tseng, Christine Y., Fogg, Louis F., Eastman, Charmane I.

“…Various combinations of interventions were used to phase-delay circadian rhythms to correct their misalignment with night work and day sleep. Young…”
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Circadian phase, circadian period and chronotype are reproducible over months by Kantermann, Thomas, Eastman, Charmane I

“…The timing of the circadian clock, circadian period and chronotype varies among individuals. To date, not much is known about how these parameters vary over…”
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Melatonin phase shifts human circadian rhythms in a placebo-controlled simulated night-work study by Sharkey, Katherine M, Eastman, Charmane I

“…There has been scant evidence for a phase-shifting effect of melatonin in shift-work or jet-lag protocols. This study tested whether melatonin can facilitate…”
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Advancing circadian rhythms before eastward flight : A strategy to prevent or reduce jet lag by EASTMAN, Charmane I, GAZDA, Clifford J, BURGESS, Helen J, CROWLEY, Stephanie J, FOGG, Louis F

“…To develop a practical pre-eastward flight treatment to advance circadian rhythms as much as possible but not misalign them with sleep. One group had their…”
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Complete or partial circadian re-entrainment improves performance, alertness, and Mood during night-shift work by CROWLEY, Stephanie J, LEE, Clara, TSENG, Christine Y, FOGG, Louis F, EASTMAN, Charmane I

“…To assess performance, alertness, and mood during the night shift and subsequent daytime sleep in relation to the degree of re-alignment (re-entrainment) of…”
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Diagnosis and Treatment of Non-24-h Sleep–Wake Disorder in the Blind by Emens, Jonathan S., Eastman, Charmane I.

“…Non-24-h sleep–wake disorder (non-24) is a circadian rhythm disorder occurring in 55–70% of totally blind individuals (those lacking conscious light…”
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Free‐running circadian period in adolescents and adults by Crowley, Stephanie J., Eastman, Charmane I.

“…Summary Sleep timing shifts later during adolescence (second decade). This trend reverses at ~20 years and continues to shift earlier into adulthood. The…”
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