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Information about Eyebrows

An unmodified male eyebrow and eye
Latinsupercilium
MeSH | Eyebrows |


The eyebrow is an area of coarse skin hairs above the eye that follows the shape of the brow ridges.

Functions

The main function of the eyebrow is to prevent moisture, mostly salty sweat and rain, from flowing into the eye, an organ critical to sight. The typical curved shape of the eyebrow (with a slant on the side) and the direction in which eyebrow hairs are pointed, make sure that moisture has a tendency to flow sideways around the eyes, along the side of the head and along the nose. The slightly protruding brow ridges of modern humans could also still play a supporting role in this process. Together with the eyebrows, the brow ridges also shade the eyes from sunlight.

Eyebrows also prevent debris such as dandruff and other small objects from falling into the eyes, as well as providing a more sensitive sense for detecting objects being near the eye, like small insects.

Eyebrows also have an important facilitative function in communication, strengthening expressions like surprise or anger. In African cultures, raising and lowering the eyebrows is used as a confirmation sign (the equivalent of nodding).

Eyebrow modification

Enlarge picture
A female eyebrow that has been waxed
It is common for people to pluck their eyebrows to maintain a clean and fashionable appearance with the use of tweezers and waxing. Threading eyebrows has also become a popular method because it does not pull at the skin. All of these methods can be painful for some seconds or minutes due to the sensitivity of the area around the eye but often this pain decreases over time as the individual becomes used to the sensation.

Some people also choose to pierce their eyebrow.

See also



 •  • [ e]
Accessory organs of the eye
GeneralEyebrow - Eyelid - Canthus - Eyelash - Ciliary glands - Orbital septum - Plica semilunaris - Meibomian gland
Lacrimal apparatusLacrimal lake - Lacrimal gland - Lacrimal canaliculi - Lacrimal punctum - Lacrimal papilla - Nasolacrimal duct
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. Created and updated by the United States National Library of Medicine (NLM), it is used by the MEDLINE/PubMed
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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The supraorbital foramen is a bony elongated path located above the orbit (eye socket) and under the forehead. The supraorbital foramen lies directly under the eyebrow.
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SWEAT is an OLN/TSN show hosted by Julie Zwillich that aired in 2003-2004.

Each of the 13 half-hour episodes of SWEAT features a different outdoor sport: kayaking, mountain biking, ice hockey, beach volleyball, soccer, windsurfing, rowing, Ultimate, triathlon,
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Rain is a type of precipitation, a product of the condensation of atmospheric water vapor that is deposited on the earth's surface. It forms when separate drops of water fall to the Earth's surface from clouds.
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supraorbital ridge, supraorbital torus, superciliary ridge, arcus superciliaris, or brow ridge, refer to a bony ridge located above the eye sockets of all primates. In Homo sapiens sapiens (modern man) the eyebrows are located on their lower margin.
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Dandruff
Classification & external resources

A large flake of dandruff combed from a beard

ICD-9 690.18

DiseasesDB 11911

Dandruff (also called scurf and historically termed Pityriasis capitis
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Insecta
Linnaeus, 1758

Orders
Subclass Apterygota
* Archaeognatha (bristletails)
* Thysanura (silverfish)
Subclass Pterygota
* Infraclass Paleoptera (Probably paraphyletic)

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Surprise is a brief emotional state that is the result of an unexpected event. It is one of the six basic emotions identified by Paul Ekman and Wallace Friesen in their 1975 book, Unmasking the Face.
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original research or unverifiable claims.
* It is in need of attention from an expert on the subject. may be able to help recruit one.
* It may require general cleanup to meet Wikipedia's quality standards.
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Africa is the world's second-largest and second most-populous continent, after Asia. At about 30,221,532 km² (11,668,545 sq mi) including adjacent islands, it covers 6% of the Earth's total surface area, and 20.4% of the total land area.
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Tweezers are tools used for picking up small objects that are not easily handled with the human hands. They are probably derived from tongs, pincers, or scissors-like pliers used to grab or hold hot objects from the dawn of recorded history.
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eyebrow piercing is a type of body piercing done through the eyebrow, usually vertically. Eyebrow piercings are relatively common facial piercings. They may be pierced anywhere along the eyebrow from directly above the eye to the edge of the eyebrow.
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Threading is an ancient method of hair removal which originated in parts of India, the Middle and Far East, and is now gaining popularity in Western countries. It is as popular with men in Arabic countries as it is with women, though they still shave the beard part of their face
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Trichotillomania
Classification & external resources

ICD-10 F63.3
ICD-9 312.39

DiseasesDB .htm 29681
MedlinePlus .htm 001517 |]
eMedicine derm/433   ped/2298

Trichotillomania
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A unibrow or monobrow, medically known as a synophrys, refers to a "confluence of eyebrows"; i.e. the presence of abundant hair between the eyebrows, so that they seem to converge to form one long eyebrow.
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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An eyelid is a thin fold of skin and muscle that covers and protects an eye. With the exception of the prepuce and the labia minora, it has the thinnest skin of the whole body. The levator palpebrae superioris muscle retracts the eyelid to "open" the eye.
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Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet.

The bicanthal plane is the transversal plane linking both canthi and defines the upper boundary of the midface.
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An eyelash or simply lash is one of the hairs that grow at the edge of the eyelid. Eyelashes protect the eye from debris and perform some of the same function as whiskers do on a cat or a mouse in the sense that they are sensitive to being touched, thus providing a warning
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Glands of Moll, also known as ciliary glands, are modified apocrine sweat glands that are found on the margin of the eyelid. They are next to the base of the eyelashes, and anterior to the Meibomian glands within the distal eyelid margin.
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The orbital septum (palpebral ligament) is a membranous sheet that acts as the anterior boundary of the orbit. It extends from the orbital rims to the eyelids.
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The plica semilunaris is a small fold of bulbar conjunctiva on the inner corner of the eye. It is loose, so that eye movements are not restricted.

It is the vestigial remnant of the nictitating membrane (the "third eyelid") which is present in other animals.
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The meibomian glands (or tarsal glands) are a special kind of sebaceous glands at the rim of the eyelids, responsible for the supply of sebum, an oily substance that prevents evaporation of the eye's tear film, prevents tear spillage onto the cheek, and makes the closed
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The lacrimal apparatus is the physiologic system containing the orbital structures for tear production and drainage[1]. It consists of:
  • (a) the lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the

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The lacrimal lake is the pool of tears in the lower conjunctival cul-de-sac, which drains into the opening of the tear drainage system (the puncta lacrimalia)[1]. The volume of the lacrimal lake has been estimated to be between 7 and 10 ÂµL.
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The lacrimal glands are paired glands, one for each eye, that secrete the aqueous layer of the tear film. They are situated in the upper, outer portion of each orbit.

Anatomy


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The lacrimal canaliculi, also known as the lacrimal canals or lacrimal ducts, are the small channels in each eyelid that commence at minute orifices, termed puncta lacrimalia, on the summits of the papillæ lacrimales, seen on the margins of the lids at the
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The lacrimal canaliculi, one in each eyelid, commence at minute orifices, termed puncta lacrimalia (or lacrimal punctum, or lacrimal point), on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis.
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