Furthermore, their behavioral activity was organized into circadian rhythms that are typical of mice in DD.
Life of almost all organisms is governed by various biological rhythms that are defined as physiological and behavioral oscillations.
"Circadian rhythms" (e.g., melatonin production) denote those endogenous, near 24-hr physiologic, metabolic, or behavioral rhythms that persist under constant nonentrainment conditions (e.g., constant darkness) and are presumably driven by the molecular clockwork mechanism in the suprachiasmatic nucleus (SCN) and peripheral tissues (Dunlap et al. 2004).
Everybody's got rhythm -- circadian rhythm, that is.
By the beginning of the 21st Century, we had considerable knowledge about how the core oscillator generates circadian rhythms; however, less was known about how the oscillator regulates downstream biological, physiological, and behavioral processes that are under circadian control.
Cognitive-behavioral therapy for insomnia and bright light therapy for circadian rhythm disturbances are empirically supported treatments that are particularly promising for the HSCT setting.
Transplants of fetal SCN tissue to SCN-lesioned animals restore rhythmic behavior that is consistent with the periodicity of the donor's genotype [5], [6], [7], suggesting that the SCN controls the period of the circadian behavioral rhythm.
Because the previous study demonstrated that inhibition of neuronal coupling among the SCN neurons resulted in prolongation of the period in behavioral rhythms, it is possible that disruption of the neuronal coupling by the CaMKII mutation might have affected strongly the period length of the behavioral rhythms.
This inability of Vipr2−/− Arc/ME/PT and pituitary to maintain an in vitro phase that correlates with the phase of behavioral rhythms is surprising given that these tissues show no alteration in period, amplitude or rate of damping of PER2::LUC expression.
