The Sleep Glossary! How Much Do You Know About Sleep?

When we talk about sleep, we learn a lot of new words and information about it!

The Sleep Glossary! How Much Do You Know About Sleep?

Read now our useful glossary about sleep, and take a look every time you need!

Circadian Rhythm 

It’s the cycle that rules all our physiological processes during the 24 hours: It’s regulated by our biological clock and influenced by external factors such as light and temperature.


One of the many hormones that regulates stress; it’s produced by the adrenal glands and it’s secreted when we are going to wake up.


It’s the process by which our body naturally tends to maintain itself in a stable state all its internal conditions, including blood pressure, and body temperature.


The region of the nervous system that is located between the 2 brain hemispheres and controls the body temperature, the thirst, the hunger, and even the sleep.

Independent Springs

The support system of a mattress consisting of many small independent pocket springs that provide a different support to our body shape. More information here: Spring Mattresses Buyer’s Guide


The most common sleep disorder characterized by a difficult to fall asleep or to sleep al night long.

Load-Bearing Capacity

It’s the capacity of a mattress to “push up” our body under the pressure of its weight: It’s a very important characteristic of each mattress to avoid the unpleasant “sinking” effect.


The hormone secreted by the pineal gland that improves an healthy and good sleep, especially in connection with the presence of light.

Memory Foam

Memory Foam is one of the newest materials used to realized mattresses and pillows and made of viscoelastic foam with an extraordinary antiallergic capacity. Lean more about it reading this article: Relaxody: The Innovative Memory Foam And Customizable Mattress


The myoclonic jerks are involuntary muscle spasms that can occur especially while falling asleep. Please read this article to know more about them: Have You Ever Had Muscular Contractions Or the Falling Sensation During the Sleep?


Another sleep disorder, less common than the previous, which cause sudden and uncontrollable episodes of falling asleep.

NREM Phase - “Non-Rapid Eye Movement”

One of the 4 sleep phases, that precedes the REM phase, is marked by a reduction of the physiological activity and by a slowing of brain-waves. Find out more about NREM phase reading this article:


A sleep disorder that lead to anomalous behavior and physiological events during sleep.

REM Phase - “Rapid Eye Movement”

The sleep phase defined by some rapid eye movements and an intense brain activity, during which we dream.

Restless Legs Syndrome

A sleep disorder characterized by a leg discomfort that can be alleviated by frequent movements; it affects predominantly women.


One of the most dangerous sleep disorder characterized by episodes of interrupted breathing during sleep, that provoke a suddenly awaking as in “apnea”. Lear more about sleep apnea in this article: Pay Attention To These 4 Symptoms: Do You Suffer From a Sleep Disorder?

Sleep-Awake Cycle

The cycle that, following the sleep-awake biological model, alternates 8 hours of sleep with 16 hours of awaking.

“Sleeping Well” Will Be the New Words on Your Vocabulary!

If you want to talk to a sleep expert, please visit one of our specialized store closest to you: “sleeping well” will be 2 words on your sleep-vocabulary!

Written by Manifattura Falomo – Marketing Office

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