Biological ClocksCircadian RhythmCLOCK ProteinsCircadian ClocksSuprachiasmatic NucleusPeriod Circadian ProteinsARNTL Transcription FactorsCavesCryptochromesLightPhotoperiodPeriodicityOscillometryCircadian Rhythm Signaling Peptides and ProteinsFlavoproteinsMelatoninDarknessModels, BiologicalNeurospora crassaNuclear ProteinsTime FactorsGene Expression RegulationCell Cycle ProteinsTranscription FactorsRNA, MessengerAgingTheta RhythmBrain WavesCalcium SignalingCalciumNuclear Receptor Subfamily 1, Group D, Member 1ElectroencephalographyFeedback, PhysiologicalActivity CyclesEl Nino-Southern OscillationNeuronsBeta RhythmAction PotentialsCortical SynchronizationNerve NetComputer SimulationChest Wall OscillationModels, NeurologicalAlpha RhythmBasic Helix-Loop-Helix Transcription FactorsMolecular Sequence Data