Tag Archives: Sleep Medicine

Old Age: ‘Hyperexcitable Neurons’ Interrupt Sleep

For many older adults, a good night’s rest is elusive. The implications of chronically poor sleep can be far-reaching and include a decline in cognitive functioning and detrimental effects on health and general well-being. Fortunately, relief may be in sight.

A new study led by investigators at the Stanford University School of Medicine shows that neurons in the lateral hypothalamus, a brain region, play a pivotal role in sleep loss in old mice. More specifically, the arousal-promoting hypocretin neurons become hyperexcitable, driving sleep interruptions.

Read the full story: https://stan.md/3JQ7z77

Luis de Lecea, PhD, is a professor of psychiatry and behavioral sciences at Stanford Medicine. He is the study’s senior author and hopes the finding could pave the way to new drug treatments for age-related sleep problems in humans.

Shi-Bin Li, PhD, is an instructor in the Psychiatry and Behavioral Sciences department at Stanford Medicine. He is also a basic life research scientist in the de Lecea lab, and is the lead author of the study.

Tributes: Sleep Medicine Pioneer William Dement Dies At 91 – “Drowsiness Is Red Alert” (1928 – 2020)

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June 18, 2020

The Promise of Sleep - William C. Dement MDHis mission was to educate the world about the importance of sleep, which he believed was dangerously undervalued. His motto, “drowsiness is red alert,” is a message he tirelessly broadcast to his students, trainees, members of Congress and the world at large. 

William Dement, MD, PhD, known as the father of sleep medicine, died June 17 after a two-year battle with cardiovascular disease. He was 91.

William Dement MD (1928- 2020) - Father of Sleep MedicineWith a handful of other scientists, Dement, a longtime faculty member of the Stanford School of Medicine, created the fields of sleep research and sleep medicine, and his many books and lectures helped raise awareness of sleep disorders and the dangers of sleep deprivation.

Dement’s many other accomplishments and accolades range far and wide: Dement and Guilleminault were the founding editors of the journal Sleep, the first major international journal devoted to sleep, publishing the first issue in 1978. He was the author of books for lay readers, including The Promise of Sleep, Some Must Watch While Some Must Sleep and The Sleepwatchers. The 2012 comedy film Sleepwalk with Me featured The Promise of Sleep and Dement in a cameo.

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Health Lecture: “Sleep Medicine, Art & Literature” By Professor Meir Kryger

Sleep medicine, art and literature – ars longa, vita brevis. Organised by the Sleep Medicine Section 4 February 2020.

Professor Meir Kryger, Author and Professor, Yale School of Medicine – Sleep Disorders & Effective Treatments.

Lecture: Sleep in art: A 7000 year odyssey

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Sleep Studies: Even Low-Levels Of Light At Night Causes Diabetes In Elderly

From a Sleep Medicine online release (January 2020):

Sleep Medicine January 2020Our findings suggest that LAN (low-level light at night) exposure increases the incidence of diabetes in a general elderly population. Further research involving a large cohort with new-onset diabetes is warranted to elucidate these findings.

Highlights

  • Humans are commonly exposed to light at night.
  • Higher light exposure at night was significantly associated with higher incidence rate of diabetes.
  • The association was consistent in the analysis using the cut-off values of LAN as 3 and 5 lux.
  • Strengths include large samples adjusting a number of confounders.

The circadian timing system, located within the suprachiasmatic nucleus of the hypothalamus, controls fundamental energy homeostasis. Clock gene mutations induce obesity in mice, and the disruption of internal circadian rhythms decreases daily energy expenditures and leptin levels in humans. Light information received by the brain influences human circadian timing and metabolism; low-level light at night (LAN) significantly increased body mass and led to prediabetes in mice. In humans, bedroom LAN affected obesity parameters; however, the association between LAN and the incidence of diabetes in humans has not been studied.

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