References

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Definition The suprachiasmatic nucleus (SCN) is a small region in the brain located just above th...

Definition A circadian rhythm is an internal biological clock that regulates the sleep-wake cycle...

Definition A hypnagogic state is the transitional phase between wakefulness and sleep. During thi...

Definition A hypnopompic state is the transitional phase between sleep and wakefulness that occur...

Definition Insomnia is a sleep disorder characterized by difficulty falling asleep, staying aslee...

Definition Parasomnia refers to a category of sleep disorders characterized by unusual behaviors,...

Definition Rapid eye movement (REM) sleep is a stage of sleep characterized by quick, darting mov...

Definition The stages of sleep refer to the distinct phases that occur during a sleep cycle, whic...

Definition Consciousness is the state of being aware - of ourselves, our surroundings, our though...