Circadian Rhythm
Research News and Information

Saturday, November 21, 2009

Differential corticosteroid receptor regulation of mesoaccumbens dopamine efflux during the peak and nadir of the circadian rhythm: a molecular equilibrium in the midbrain?

30 Oct 2009 Corticosteroid receptor modulation of mesoaccumbens dopamine neurotransmission is believed to be a key neurobiological mechanism mediating the effects of stress in addiction. Importantly, nucleus accumbens (NAc) subregions (core and shell) are ... Read more...

Halothane-induced hypnosis is not accompanied by inactivation of orexinergic output in rodents.

30 Oct 2009 BACKGROUND: One underexploited property of anesthetics is their ability to probe neuronal regulation of arousal. At appropriate doses, anesthetics reversibly obtund conscious perception. However, individual anesthetic agents may accomplish this by ... Read more...

Temperature entrainment of Drosophila's circadian clock involves the gene nocte and signaling from peripheral sensory tissues to the brain.

27 Oct 2009 Circadian clocks are synchronized by the natural day/night and temperature cycles. Our previous work demonstrated that synchronization by temperature is a tissue autonomous process, similar to synchronization by light. We show here that this is ... Read more...

Latest indexed articles for 'Circadian Rhythm'

These are the very latest articles for this heading:

• Differential corticosteroid receptor regulation of mesoaccumbens dopamine efflux during the peak and nadir of the circadian rhythm: a molecular equilibrium in the midbrain? 30 Oct 2009
• Halothane-induced hypnosis is not accompanied by inactivation of orexinergic output in rodents. 30 Oct 2009
• Temperature entrainment of Drosophila's circadian clock involves the gene nocte and signaling from peripheral sensory tissues to the brain. 27 Oct 2009
• A stretch from the periphery helps brain clocks feel the daily heat. 27 Oct 2009
• Time is of the essence: vascular implications of the circadian clock. 25 Oct 2009
• AMPK regulates the circadian clock by cryptochrome phosphorylation and degradation. 14 Oct 2009
• Physiology. Feeding the clock. 14 Oct 2009
• Cycling behavior and memory formation. 12 Oct 2009
• Daily electrical silencing in the mammalian circadian clock. 7 Oct 2009
• Comment on "The Arabidopsis circadian clock incorporates a cADPR-based feedback loop". 7 Oct 2009
• Time-dependent effects of low-dose aspirin on plasma renin activity, aldosterone, cortisol, and catecholamines. 3 Oct 2009
• Glucocorticoid regulation of the circadian clock modulates glucose homeostasis. 3 Oct 2009
• Assessment of the ozone-nitrogen oxide-volatile organic compound sensitivity of Mexico City through an indicator-based approach: measurements and numerical simulations comparison. 29 Sep 2009
• Interactions between cognition and circadian rhythms: attentional demands modify circadian entrainment. 29 Sep 2009
• Phototrophic biofilm activity and dynamics of diurnal Cd cycling in a freshwater stream. 29 Sep 2009
• In situ monitoring of the diurnal cycling of dynamic metal species in a stream under contrasting photobenthic biofilm activity and hydrological conditions. 29 Sep 2009
• Effects of warming and altered precipitation on plant and nutrient dynamics of a New England salt marsh. 29 Sep 2009
• Actigraphy: a valuable diagnostic tool or a luxury investigation? (Neuropsychiatric aspects). 28 Sep 2009
• Dissociation of circadian and light inhibition of melatonin release through forced desynchronization in the rat. 28 Sep 2009
• Antennal circadian clocks coordinate sun compass orientation in migratory monarch butterflies. 23 Sep 2009

See a longer list of these articles.

Technical information about 'Circadian Rhythm'

Definition: The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness.

Descriptor UI: D002940

Alternative terms: Circadian Rhythm; Circadian Rhythms; Rhythm, Circadian; Rhythms, Circadian; Nyctohemeral Rhythm; Nyctohemeral Rhythms; Rhythm, Nyctohemeral; Rhythms, Nyctohemeral; Twenty-Four Hour Rhythm; Rhythm, Twenty-Four Hour; Rhythms, Twenty-Four Hour; Twenty Four Hour Rhythm; Twenty-Four Hour Rhythms; Diurnal Rhythm; Diurnal Rhythms; Rhythm, Diurnal; Rhythms, Diurnal;

Related Mesh Headings: Photoperiod; Chronotherapy;

Allowable Qualifiers: drug effects; genetics; immunology; physiology; radiation effects; ethics;

Tree Number: G07.180.562.190;

History Note: 66(64); DIURNAL RHYTHM was see under CIRCADIAN RHYTHM 1975-85 (Prov 1969-74)

Technical Notes: drug admin based on circadian rhythm = CHRONOTHERAPY: do not coord with CIRCADIAN RHYTHM or DRUG ADMINISTRATION SCHEDULE; jet lag: index JET LAG SYNDROME