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Related Concept Videos

Human Genetics01:28

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
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Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
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Related Experiment Video

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Noninvasive, High-throughput Determination of Sleep Duration in Rodents
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Genetics of Sleep Disorders.

Philip R Gehrman1, Brendan T Keenan2, Enda M Byrne3

  • 1Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, 3535 Market Street, Suite 670, Philadelphia, PA 19104, USA.

The Psychiatric Clinics of North America
|November 25, 2015
PubMed
Summary

Genetic factors significantly influence sleep disorders. While some, like narcolepsy, have identified genes, others like insomnia require more research, focusing on improved phenotyping for future genetic discoveries.

Keywords:
GeneticsInsomniaNarcolepsyRestless legs syndromeSleep apneaSleep disorder

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Area of Science:

  • Genetics
  • Sleep Medicine
  • Statistical Genetics

Background:

  • Genetic variability contributes to individual differences in sleep disorders.
  • Progress has been made in identifying genes for specific conditions like narcolepsy (e.g., human leukocyte antigen gene).
  • Research into the genetic basis of disorders like insomnia remains limited.

Purpose of the Study:

  • To highlight the role of genetic variability in sleep disorders.
  • To emphasize the need for optimized phenotyping strategies in genetic sleep disorder research.
  • To discuss the potential of intermediate traits for genetic studies in conditions like sleep apnea.

Main Methods:

  • Review of current understanding of genetic contributions to sleep disorders.
  • Discussion of advancements in genotyping and statistical genetics.
  • Exploration of phenotyping strategies for complex sleep disorders.

Main Results:

  • Specific genes have been identified for certain sleep disorders (e.g., narcolepsy).
  • Intermediate traits (e.g., obesity, craniofacial features) may be valuable for genetic studies in sleep apnea.
  • The field anticipates significant future discoveries due to technological advances.

Conclusions:

  • Genetic factors are crucial in understanding sleep disorders.
  • Optimized phenotyping is essential for advancing genetic research in sleep medicine.
  • Rapid progress in genetic technologies promises new insights into the genetic underpinnings of sleep disorders.