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Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

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Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
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Continuous probability distributions are used to model random variables that can take on any real value within a specified range. These variables do not take on isolated or countable values but rather exist on a continuum. For example, the height of an individual can be measured with increasing precision—such as 163.5 or 165.25 centimeters—demonstrating that height is a continuous random variable.The behavior of such variables is described using a probability density function (PDF),...
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Establishing a Device for Sleep Deprivation in Mice
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Abnormal functional connectivity density in sleep-deprived subjects.

Liu Yang1,2, Yu Lei1,2,3, Lubin Wang1,2

  • 1Beijing Institute of Basic Medical Sciences, Beijing, People's Republic of China.

Brain Imaging and Behavior
|March 1, 2018
PubMed
Summary
This summary is machine-generated.

Sleep deprivation alters brain connectivity, decreasing functional connectivity density in key areas like the prefrontal cortex. This study reveals how total sleep deprivation impacts brain organization and performance on vigilance tasks.

Keywords:
Functional connectivity densityResting stateSleep deprivationfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Sleep deprivation (SD) significantly impacts intrinsic brain functional organization.
  • Understanding the effects of SD on whole-brain low-frequency connectivity is crucial.

Purpose of the Study:

  • To investigate the effects of total sleep deprivation (TSD) on spontaneous brain functional organization.
  • To characterize changes in intrinsic low-frequency connectivity across the whole brain.

Main Methods:

  • Voxel-based functional connectivity density (FCD) analysis.
  • Within-subject crossover functional magnetic resonance imaging (fMRI) study.
  • Comparison between rested wakefulness (RW) and 36 hours of TSD in 37 healthy participants.

Main Results:

  • Decreased long- and short-range FCDs were observed in the posterior cingulate cortex, precuneus, and prefrontal cortex regions.
  • Increased long- and short-range FCDs were found in sensory integration and arousal-regulating areas like the thalamus and postcentral gyrus.
  • A negative correlation between posterior cingulate cortex FCD and reaction time on the Psychomotor Vigilance Task was identified.

Conclusions:

  • Total sleep deprivation significantly alters spontaneous functional brain organization.
  • Findings elucidate the neural mechanisms underlying brain activity changes during sleep deprivation.
  • These alterations in brain connectivity may underlie performance deficits observed after sleep loss.