Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Mechanisms underlying hypothalamic temperature changes during sleep in mammals

A Azzaroni1, P L Parmeggiani

  • 1Istituto di Fisiologia Umana, Università di Bologna, Italy.

Brain Research
|December 31, 1993
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Interaction between theory and experiment in the study of sleep physiology: a historical survey of early sleep research.

Revue neurologique·2008
Same author

REM sleep related increase in brain temperature: a physiologic problem.

Archives italiennes de biologie·2007
Same author

[Wake-sleep cycle and vegetative regulation].

Cardiologia (Rome, Italy)·2002
Same author

REM sleep enhancement due to rhythmical auditory stimulation in the rat.

Behavioural brain research·2001
Same author

Pattern of REM sleep occurrence in continuous darkness following the exposure to low ambient temperature in the rat.

Behavioural brain research·2001
Same author

Behavioral state-dependent thermal feedback influencing the hypothalamic thermostat.

Archives italiennes de biologie·2000

Hypothalamic temperature (Thy) regulation during sleep involves heat loss mechanisms during synchronized sleep (SS) and altered blood flow to the brain during desynchronized sleep (DS). These findings clarify thermoregulation during the wake-sleep cycle.

Area of Science:

  • Neuroscience
  • Physiology
  • Sleep Science

Background:

  • Understanding hypothalamic temperature (Thy) regulation is crucial for comprehending the sleep-wake cycle.
  • The interplay between brain temperature and sleep stages remains incompletely understood.

Purpose of the Study:

  • To investigate the mechanisms of hypothalamic temperature (Thy) changes during the ultradian wake-sleep cycle in cats.
  • To determine the influence of systemic blood temperature, head heat exchange, and carotid artery occlusion on Thy during different sleep stages.

Main Methods:

  • Cats were chronically implanted with EEG, EMG, and temperature transducers.
  • Hypothalamic (Thy), pontine (Tp), and ear pinna (Ts) temperatures were monitored.
  • Systemic blood temperature, head heat loss, and carotid artery occlusion were experimentally manipulated.

Related Experiment Videos

Main Results:

  • Hypothalamic temperature (Thy) decrease during synchronized sleep (SS) is linked to increased heat loss via ear pinna exchangers.
  • Hypothalamic temperature (Thy) increase during desynchronized sleep (DS) results from altered cerebral blood flow in the Circle of Willis.
  • Warm vertebral blood supply increases, while cool carotid blood supply decreases during DS, affecting Thy.

Conclusions:

  • Hypothalamic temperature (Thy) regulation during sleep is stage-dependent, involving distinct physiological mechanisms.
  • Heat loss is a key factor in Thy reduction during SS.
  • Altered cerebral blood flow dynamics significantly impact Thy during DS.