wikipedia

Thalamus

The thalamus (from Greek θάλαμος = bedroom, chamber, IPA= /ˈθæləməs/) is a pair and symmetric part of the brain. It constitutes the main part of the diencephalon.

[...]
http://en.wikipedia.org/wiki/Thalamus

Bedroom

A bedroom is a large room where people usually sleep for the night and/or for relaxation during the day.
Many houses in North America, Australia and Europe have at least two bedrooms – usually a master bedroom (dedicated to the heads of the household, such as a husband and wife) and one or more bedrooms for either the children or guests.
In some jurisdictions there are basic features (such as a closet and a "means of egress") which a room must have in order to be qualify as a bedroom. According to Zillow,
Generally, bedrooms are defined as having a minimum of 70 square feet of usable space, with a window and closet. A bedroom may be below ground level. A room cannot be considered a bedroom if it is used to access another room, unless the other room is a bathroom.[1]
Nevertheless, some real estate agents may stretch the definition when listing a home for sale.
In buildings with multiple self-contained housing units (e.g., apartments), the number of bedrooms vary widely. While many such units have at least one bedroom—frequently, these units have at least two—some of these units may not have a specific room dedicated for use as a bedroom. (These units may be known by various names, including studio, efficiency, bedsit, and others.)
Furniture and other items in bedrooms vary greatly, depending on taste and local tradition. For instance, a master bedroom may include a bed of a specific size (double, king or queen-sized); one or more dressers (or perhaps, a wardrobe armoire); a nightstand; one or more closets; and carpeting. Built-in closets are less common in Europe than in North America; thus there is greater use of freestanding wardrobes or armoires in Europe.
Bedding used in northern Europe (especially in Scandinavia) is significantly different from that used in North America and other parts of Europe.
Some bedrooms also include such items as a make-up desk, television, air conditioning and various accessories (such as lamps, telephone and an alarm clock).
Sometimes, a master bedroom is connected to a dedicated bathroom, often called an ensuite. [...]
http://en.wikipedia.org/wiki/Bedroom

Sleep

Sleep is a natural state of bodily rest observed throughout the animal kingdom, in all mammals and birds, and in many reptiles, amphibians, and fish.
In humans, other mammals, and a substantial majority of other animals which have been studied — such as fish, birds, ants, and fruit-flies — regular sleep is essential for survival. However, its purposes are only partly clear and are the subject of intense research. [...]
http://en.wikipedia.org/wiki/Sleep