Whois & Analysis for sleepcycle.com

A circadian rhythm is any biological process that displays an endogenous, entrainable oscillation of about 24 hours.

These 24-hour rhythms are driven by a circadian clock, and they have been widely observed in plants, animals, fungi, and cyanobacteria.

An alarm clock (or sometimes just an alarm) is a clock that is designed to alert an individual or group of individuals at specified time.

The primary function of these clocks is to awaken people from their night's sleep or short naps; they are sometimes used for other reminders as well.

Most use sound; some use light or vibration.

Some have sensors to identify when a person is in a light stage of sleep, in order to avoid waking someone who is deeply asleep, which causes tiredness, even if the person has had adequate sleep.

To stop the sound or light, a button or handle on the clock is pressed; most clocks automatically stop the alarm if left unattended long enough.

A classic analog alarm clock has an extra hand or inset dial that is used to specify the time at which to activate the alarm.

Alarm clocks are also found on mobile phones and watches.

Circadian rhythm sleep disorders (CRSD), a family of sleep disorders, affect (among other bodily processes) the timing of sleep.

People with circadian rhythm sleep disorders are unable to go to sleep and awaken at the times commonly required for work and school as well as social needs.

They are generally able to get enough sleep if allowed to sleep and wake at the times dictated by their "body clocks".

The quality of their sleep is usually normal unless they also have another sleep disorder.

Sleep is a naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, inhibition of nearly all voluntary muscles, and reduced interactions with surroundings.

It is distinguished from wakefulness by a decreased ability to react to stimuli, but is more easily reversed than the state of being comatose.

Sleep occurs in repeating periods, in which the body alternates between two highly distinct modes known as non-REM and REM sleep.

Although REM stands for "rapid eye movement", sleep affects other brain-body functions, including virtual paralysis of the body.